When placed at the same temperature, the entropy of 10 mole of Ar(g) at 10.0 atm and the 10 mole of Ar(g) at 0.5 atm. The system has a higher entropy is 10 mole of Ar(g) at 0.5 atm.
The entropy is the measure the randomness of the of the system. the measure of the system's thermal energy per unit the temperature that is not available for doing the useful work.
The Entropy will increases with temperature at the constant pressure. The pressure increases leads to the higher degree of the order in the molecular arrangement. so, the entropy decreases with the increasing pressure.
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5. Calculate the number of molecules in 360g of glucose.
5) A vast, underwater mountain chain is called a(n).
OA) deep-sea trench
OB) oceanic crust
OC) ocean ridge
OD) ocean floor sediment
Dr. Fowler is studying two groups of rats. Group A lives outdoors and Group B lives indoors. Dr. Fowler observes that the outdoor group seems to learn more quickly, a trait she believes is due to genetic differences between the two groups of rats. How should Dr. Fowler test her hypothesis in order to rule out another likely alternative?
Dr. Fowler tests her hypothesis in order to rule out another likely alternative through the fact that it evaluates the key vulnerabilities to climate change, and assesses aggregate damage levels and the role of multiple stresses.
What is a Hypothesis?A hypothesis may be defined as a testable statement about the relationship between two or more variables or a proposed explanation for some observed phenomenon.
According to the context of this question, if the rats of Group A live outdoors, it seems to learn more quickly. This is because of the presence of a specific trait. This trait is due to genetic differences between the two groups of rats which governs the specific phenotypic expression in the overall presence of genes or alleles.
Therefore, the fact that it evaluates the key vulnerabilities to climate change, and assesses aggregate damage levels and the role of multiple stresses.
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a student conducted an experiment where she ground up different antacids and mixed them with water and a drop of phenol red (a ph indicator), then added drops of hcl (acid). she observed how many drops of acid it took to change the color of the phenol red from red to yellow. what is the independent variable
The different antacids used will be the independent variable.
Antacids are medications that alleviate heartburn and indigestion by decreasing the amount of acid in stomach. They are bases that are used to neutralize acidity (caused by acids) - which occurs when your stomach releases too much of HCl acid in the stomach. They do this neutralization of stomach acid by inhibiting an enzyme that produces acid in order to break down food for digestion (pepsin). High level of acid production in stomach can lead to acidity which may result in production of gases (resulting in bloating and discomfort) and gastric ulcers. Regarding how phenol red acts as a pH indicator, over the pH range of 6.6 to 8.0, its color gradually transitions from yellow to red. When the pH rises above 8.1, phenol red turns a bright pink (fuchsia) color. This color change is caused by phenol red losing protons (and changing color) as the pH rises. But addition of HCl would start imparting the nature of acids to the solution, so the color change would go from red to yellow.
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LEARNING TASK 3
Answer And Solution
1. Calculate the molar mass of Ferric Oxide (Fe2O3)
2. Calculate the molar mass of Lactic acid (C3H6O3)
3. Calculate the molar mass of water (H2O)
4. Calculate the molar mass of ascorbic acid (C6H8O6)
Subject Is Science:-)
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The molar mass of Ferric Oxide (Fe2O3) is calculated as follows:
Fe: (2 atoms) x (56 g/mol) = 112 g/mol
O: (3 atoms) x (16 g/mol) = 48 g/mol
Fe2O3 = 112 g/mol + 48 g/mol = 160 g/mol
The molar mass of Lactic acid (C3H6O3) is calculated as follows:
C: (3 atoms) x (12.01 g/mol) = 36.03 g/mol
H: (6 atoms) x (1.01 g/mol) = 6.06 g/mol
O: (3 atoms) x (16 g/mol) = 48 g/mol
C3H6O3 = 36.03 g/mol + 6.06 g/mol + 48 g/mol = 90.09 g/mol
The molar mass of water (H2O) is calculated as follows:
H: (2 atoms) x (1.01 g/mol) = 2.02 g/mol
O: (1 atom) x (16 g/mol) = 16 g/mol
H2O = 2.02 g/mol + 16 g/mol = 18.02 g/mol
The molar mass of ascorbic acid (C6H8O6) is calculated as follows:
C: (6 atoms) x (12.01 g/mol) = 72.06 g/mol
H: (8 atoms) x (1.01 g/mol) = 8.08 g/mol
O: (6 atoms) x (16 g/mol) = 96 g/mol
C6H8O6 = 72.06 g/mol + 8.08 g/mol + 96 g/mol = 176.14 g/mol
When 0. 55 grams of magnesium reacts with nitrogen, a chemical reaction occurs. The product of the reaction weights 0. 76 grams. Calculate the empirical formula of the compound containing Mg and N
The empirical formula of the compound containing Mg and N is Mg₃N₂.
The outcome of the Mg + N2 reaction is:
Mg + N₂ → MgₓNₙ
the following are contained in 0.55g of magnesium:
Mg is represented as 0.55g x (1 mol / 24.305g) = 0.0226 moles.
Due to the product's 0.76g mass, the mass of nitrogen is as follows:
0.76g minus 0.55g equals 0.21g of nitrogen.
0.015 moles of N are equal to 0.21g x (1 mol / 14g).
The ratio of N:Mg in moles is:
0.0226 / 0.015 = 1.5. This indicates that you have 1.5 Mg atoms for every N atom. The problem's empirical formula, which is the simplest whole-number ratio of atoms in a compound, is:Mg₃N₂
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Use relative differences in electronegativity to label the ends of the polar molecules listed as partially positive or partially negative.
1) H is partially positive F is partially negative
2) H is partially positive Br is partially negative
3) H is partially positive O is partially negative
4) C is partially positive O is partially negative.
What is electronegativity?When we talk about electronegativity, we mean the fact that, in the compound, there is a part that is partially negative and there is a part that is partially positive.
The part of the compound that is partially negative is the part of the compound that is able to attract the pair of electrons that are shared by the two atoms to itself.
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aroma 101:volatility is defined as group of answer choices how quickly a substance solidifies how quickly a substance will react with another substance the speed or rate at which a substance evaporates when exposed to the air the speed at which a plant produces an essential oil
The volatile is defined as the speed or rate at which a substance evaporates when exposed to the air.
The Volatility is indicated by the substance's vapor pressure. It is the tendency of the substance to the speed at which it vaporizes or evaporates. The Substances with the higher vapor pressure will be vaporize more easily at the given temperature than compared to the substances with the lower the vapor pressure.
Thus, the speed or rate at which a substance evaporates when exposed to the air is termed as the volatility. It is tendency of the substances to get vaporize.
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please help!!
Strontium-90 has a half-life of 28.8 years. If you start with a 10-gram sample of strontium-90, how much will be left after 115.2 years? Justify your answer.
The amount that will be left after 115.2 years, given that you started with 10 grams sample of strontium-90 is 0.625 g
How do I determine the amoun remaining after 115.2 years?To obtain the amount that will be left after 115.2 years, we shall begin our calculation by obtaining the number of half lives that has passed.
The number of half lives that has passed can be obtained as followed:
Half-life (t½) = 28.8 yearsTime (t) = 2 months = 115.2 yearsNumber of half-lives (n) =?n = t / t½
n = 115.2 / 28.8
n = 4
Thus, 4 half lives has passed.
Finally, we shall determine the amount that will be left after 115.2 years. This is illustrated below:
Number of half-lives (n) = 4Original amount (N₀) = 10 gAmount remaining (N) = ?N = N₀ / 2ⁿ
N = 10 / 2⁴
N = 10 / 16
N = 0.625 g
Thus, we can conclude that the amount that will be left after 115.2 years is 0.625 g
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a certain substance has a density of 19.3 g/cm3. what volume (in cm3) would be occupied by a 1255mg sample of this substance? report your answer to proper significant figures.
To find the volume of a 1255 mg sample of a substance with a density of 19.3 g/cm3, we need to divide the mass by the density.
The formula for calculating the volume of a substance from its mass and density is given by the equation:
Volume = Mass / Density
In this case, the mass of the sample is 1255 mg, which is equivalent to 1.255 g. The density of the substance is 19.3 g/cm3. Plugging in the values, we get:
Volume = 1.255 g / 19.3 g/cm3 = 0.0649 cm3
So, a 1255 mg sample of the substance with a density of 19.3 g/cm3 would occupy a volume of 0.0649 cm3. This answer should be reported to three significant figures, which is consistent with the precision of the mass measurement.
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an aqueous solution of silver fluoride, agf, contains 2.96 grams of silver fluoride and 17.6 grams of water. the percentage by mass of silver fluoride in the solution is
An aqueous solution of the silver fluoride, AgF, contains 2.96 grams of the silver fluoride and 17.6 grams of the water. The percentage by mass of silver fluoride in the solution is 14.3 %.
The mass of the silver fluoride = 2.96 g
The mass of the water = 17.6 g
The mass of the solution = mass of the AgF + mass of water
= 2.96 g + 17.6 g
= 20.56 g
The percentage by mass is expressed as :
The percentage by mass of AgF = (mass of AgF / mass of solution) ×100%
The percentage by mass of AgF = (2.96 g / 20.56 ) ×100%
The percentage by mass of AgF = 14.3 %
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Consider this molecular-level representation of a mixture of gases. There are three gas particles containing two spheres. There are six gas particles containing a single sphere of a different color. There are five gas particles containing a single sphere of a third color. If the partial pressure of the diatomic gas is 0. 780 bar , what is the total pressure of the system
If the partial pressure of the diatomic gas is 0. 780 bar, then the total pressure of the system is 3.64 bar
Given data :-
Number of particles of diatomic gas = 3
Number of particles of monatomic gas = 6
Number of particles of another monoatomic gas = 5
Total number of particles (or) moles in the gas mixture = 3 + 6 + 5 = 14 particles (or) moles
We know that,
Mole fraction = Number of moles of given gas / Total number of moles
Therefore,
Mole fraction of diatomic gas = Number of moles of diatomic gas / Total number of moles of mixture
=> [tex]\frac{3}{14}[/tex]
=> 0.214
Given partial pressure of diatomic gas = 0.780 bar
Raoult's law states that a gas's partial pressure in a mixture (or system) is equal to its mole fraction times the mixture's overall pressure.
Partial pressure of gas = Mole fraction × Total pressure
So,
Total pressure of system = Partial pressure of diatomic gas / Mole fraction of diatomic gas
[tex]P_{Total} = \frac{0.780}{0.214}[/tex]
=> [tex]P_{Total} = 3.64[/tex] bar.
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In the reaction:
Al2(SO4)3 + 3Ca(OH)2 → 2Al(OH)3 + 3CaSO4
How many moles of Al2(SO4)3 react with 6 mole of Ca(OH)2?
OA. 2
OB. 3
OC. 6
OD. 1
Explanation:
Al2(SO4)3 : Ca(OH)2
1 mol. : 3 mol (from equation)
2 mol : 6 mol
answer the following question by entering the numeric value with appropriate units. when entering units, capitalization is important. for example, m is the symbol for meter and m is the symbol for molarity. if the length of one side of a square is 12.0 m , what is the perimeter of the square?
f the length of one side of a square is 12.0 m, the perimeter of the square is 48.0 m
To calculate the perimeter of a square, you need to add up all four sides of the square. The formula for the perimeter of a square is P = 4s where s is the length of one side of the square.
Given that one side of the square is 12.0 m, we can plug this value into the formula to find the perimeter.
P = 4s = 4(12.0 m) = 48.0 m
So, the perimeter of the square is 48.0 m
Perimeter is the measure of the distance around the outside of a two-dimensional shape, such as a square, rectangle, triangle, or circle. It is the sum of the lengths of all the sides of the shape. It is used to measure the size or the extent of a shape and is usually measured in units such as meters, centimeters, inches, or feet.
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predicting products of chemical reactions worksheet answers
why should a chemical property of a metal be considered when building a rocket
A metal's chemical properties can affect its ability to withstand the high temperatures and pressures of a rocket launch.
How is chemistry involved in making rockets?
Chemistry is involved in making rockets in a variety of ways. The fuels used to power rockets are a mixture of flammable liquids and solid propellants, and the chemical reactions that occur when these propellants are ignited provide the thrust necessary to propel the rocket upwards. The fuels used in rocket propulsion also require precise control of their chemical composition to ensure optimal efficiency and performance. The materials used in rocket construction must be able to withstand extreme temperatures and pressures, and the use of various chemical treatments and coatings helps to achieve this. Finally, the development of new rocket fuels and other materials used in rocket construction requires extensive research and development in the field of chemistry.
Metals with higher melting points and corrosion resistance are more suitable for use in rocket construction as they will be able to withstand the harsh environment of a launch. Additionally, certain metals may be more reactive than others and can produce dangerous byproducts when exposed to extreme temperatures. Therefore, understanding the chemical properties of the metal being used can help ensure the rocket is able to withstand the launch and not cause any safety hazards.
Therefore, to withstand the high temperatures and pressures of a rocket launch chemical property of a metal is used.
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Is a covalent bond formed between a metal and a non-metal?
No, Covalent bond cant not be formed between a metal and non-metal. ionic bonds between metals and nonmetals.
A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two atomic nuclei are concurrently drawing these electrons to them. When the difference between the electronegativities of two atoms is too tiny for an electron transfer to take place to create ions, a covalent bond is formed. Bonding electrons are collectively referred to as the electrons that are present between the two nuclei. The "glue" that holds the atoms in molecular units together is the bound pair. By taking into account whether each element is a metal or nonmetal, it is possible to forecast the kind of bond that will develop between two elements. Covalent bonds between nonmetals, ionic bonds between metals and nonmetals, and metallic bonds between metals are the three types of bonds that typically form. Covalent bonds, which produce an irreversible binding and a high surface coverage, are mostly generated between side-chain-exposed functional groups of proteins and properly modified transducer surfaces. Covalent immobilisation is one of the most often utilised techniques, and it involves randomly coupling the antibody's free amino groups to a sensor surface.
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pre-lab questions 1. how does an increase in concentration affect a chemical reaction? 2. when temperature increases, what happens to the molecules in a chemical reaction? 3. how do we measure the average kinetic motion of molecules in a solution?
The concentration of molecule and temperature has a positive correlation with the chemical reaction. The higher the concentration and temperature, the faster the reaction rate will be. The average kinetic can be calculated by using this formula KE = [tex]\frac{1}{2}mv^{2}[/tex].
What are the factors that affect the reaction rate?There are some factors that affect the motion of the molecules:
Concentration of moleculeTemperatureIf the concentration is increased, more particles move together. There will be more collisions and the chemical reaction rate is increased.
The rate of a chemical reaction can be changed caused by the temperature. If the temperature is increased, it will raise the average kinetic energy of the molecule and cause it moves more quickly.
The amount of kinetic energy can be calculated with the equation:
KE = [tex]\frac{1}{2}mv^{2}[/tex] . The kinetic energy of a moving object depends on its mass and velocity. The faster a molecule moves, the more kinetic energy it has.
Thus, increasing the concentration and temperature will increase the rate of reaction. The average kinetic energy can be calculated by using this formula KE = [tex]\frac{1}{2}mv^{2}[/tex]
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Assume that 1. 5 g of lauric acid is combusted and all heat energy released is transferred to a 325 g sample at 25 degrees C. Calculate the final temperature if delta Hcombustion is -37 kJ/G and the specific heat of water is 4. 18 J/gK
88 degrees the final temperature if delta Hcombustion is -37 kJ/G and the specific heat of water is 4. 18 J/gK
delta H= Cs* delta T
delat T= delta h / cs(specific heat)
delta T= -37/4.18
delta T = 88 degrees
A calorimeter is used to calculate combustion heats. The specific heat capacity of a substance is defined as the amount of energy needed to raise one gramme of that substance's temperature by one degree Celsius. A material will store heat energy more effectively if its specific heat capacity is higher. When one mole of a substance burns, the quantity of energy produced as heat (q) is measured as the heat of combustion (H°c) (combustion). When a reaction generates heat, it is an exothermic process that releases energy.
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between methoxybenzene and toluene, which has greater separation between signals for the ortho, meta and para hydrogens?
Between methoxybenzene and toluene, toluene has greater separation because toluene has an attached methyl group, whereas benzene does not .
A hydrogen molecule is referred to as ortho hydrogen if both of its nuclei spin in the same direction. When both hydrogen nuclei are spinning in opposite directions, the molecule is referred to as para hydrogen. Ordinary dihydrogen is created when ortho and para hydrogen are in equilibrium.
Ortho substitution has two substituents in the ring's 1 and 2 locations, whereas para substitution has two substituents in the 1 and 4 positions. This is the main distinction between ortho para and meta substitution. Meta replacement, on the other hand, has two substitutes in positions 1 and 3.
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what is the volume flow rate in ml/s as the trigger is being squeezed? express your answer in milliliters per second.
The volume flow rate in ml/s will depend on the size and design of the trigger, and thus cannot be accurately determined without more information.
What is the volume flow rate in ml/s as the trigger is being squeezed?The volume flow rate in milliliters per second (ml/s) is the amount of liquid that flows through the dispenser in a given amount of time as the trigger is being squeezed. This rate can be affected by several factors, including the pressure applied when squeezing the trigger, the size of the opening in the nozzle, and the viscosity of the liquid being dispensed. To determine the volume flow rate, it is important to measure the amount of liquid that is dispensed in a certain amount of time. This can be done by determining the amount of liquid that is dispensed in a given period of time (e.g. one second) and then multiplying this by the total number of seconds in the period that the trigger was squeezed. In summary, the volume flow rate in milliliters per second (ml/s) is the amount of liquid that flows through the dispenser in a given amount of time as the trigger is being squeezed. To calculate the volume flow rate, it is important to measure the amount of liquid that is dispensed in a given period of time and then multiply this by the total number of seconds in the period that the trigger was squeezed. Factors such as the pressure applied when squeezing the trigger, the size of the nozzle, and the viscosity of the liquid being dispensed can also affect the volume flow rate.To learn more about The volume flow rate refer to:
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what is the freezing point (in degrees celcius) of 4.23 kg of water if it contains 232.8 g of c a b r 2 ? the freezing point depression constant for water is 1.86 oc/m and the molar mass of c a b r 2 is 199.89 g/mol.
The freezing point of solution is -1.53°C.
When a solute is added to the original solvent, the freezing point decreases. The freezing point depression formula is:
ΔT = kf×m×i
Where i is the Van't Hoff factor, m is the molality of the solution (moles CaBr2 -solute- / kilogram water -solvent), and Kf is the freezing point depression constant of the solvent (1.86°C/m).
Molality of the solution is:
-moles CaBr₂ (Molar mass:
232.8g ₓ (1mol / 199.89g) = 1.16 moles
Molality is:
1.16 moles CaBr₂ / 4.23kg water = 0.274m
The amount of solute produced after one mole of solid solute dissolves is represented by the Van't Hoff factor, for CaBr₂:
CaBr₂(s) → Ca²⁺ + 2Br⁻
When 1 mole of a solid solute is converted into 3 moles of ions, the Van't Hoff factor is 3.
Putting:
ΔT = kf×m×i
ΔT = 1.86°C/m×0.274m×3
ΔT = 1.53°C
The freezing point of water decreases in 1.53°C. As freezing point of water is 0°C, the freezing point of the solution is -1.53°C.
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PLEASE HELP ME!! 50 Points and BRAINLIEST if you get it right!
Use the information in the table to calculate deltaSrxn for each of these reactions. Round all answers to nearest whole number.
S (reaction) = 2.70 + 1.205 - 2,109.6 ,S ° (reaction) = 125.8 J / mol K
Calculate reactions?Entropy (S, abbreviated as entropy) in thermodynamics represented the degree of system disorder.
Entropy, like other thermodynamic concepts, can only be determined from the beginning and ending states.
Then energy is converted into different forms, entropy will also change.
Standard entropy data allow for the calculation of S °'s value.
The formula is S ° (reaction) = S ° (product) - S ° (reagent)
The standard thermodynamic quantities for chemical substances at 25 °C for entropy can be found in the CRC Handbook of Chemistry and Physics data table, 84th Edition (2004) as follows: (Supporting evidence can be found in other data.)
NH3 (g) = 192.8 J/mol K.
O2 (g) = 205 J per mole of K
Water (g) = 188.8 J/mol K
H2O (mol) = 70 J/mol K
NO2 (g)=240.1 J/mol K
H₂O₂ (l) = 109.6
S (reaction) = 2.70 + 1.205 - 2,109.6
S ° (reaction) = 125.8 J / mol K.
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White-tailed deer are mammals. Mammals have a reproductive strategy
that is not found in all animals.
Which two statements provide a cause and effect of the reproductive
strategy of white-tailed deer that helps them survive?
A. It requires two parents.
B. It requires only one parent.
C. It causes very fast growth and development.
D. It produces genetic variation within a population.
E. It results in individuals being identical to one parent.
This lack of genetic variation can lead to a decrease in the population’s ability to survive and adapt to changing environments, resulting in a population that is more at risk of extinction.
Which two statements provide a cause and effect of the reproductive strategy of white-tailed deer that helps them survive?A. It requires two parents. - CauseD. It produces genetic variation within a population. - EffectThe reproductive strategy of white-tailed deer helps them survive because it requires two parents.This helps ensure that the young deer receive the care and protection of both parents, which increases their chance of survival.Additionally, the two-parent strategy of the deer produces genetic variation within a population.This variation allows for natural selection to take place and for the population to adapt to changing environments. As a result, members of the population are more likely to survive and reproduce, creating a more resilient population.In contrast, a one-parent strategy, such as parthenogenesis, produces individuals that are identical to one parent.This lack of genetic variation can lead to a decrease in the population’s ability to survive and adapt to changing environments, resulting in a population that is more at risk of extinction.To learn more about The reproductive strategy refer to:
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Titanium oxide is often added to food to color it white. If a jelly bean contains approximately 7. 69x10 18 formula units of TiO2, how many moles of TiO2 are in a jelly bean?
0.0000128 mole TiO2 in a jelly bean.Any chemical molecule, whether created chemically or naturally, that exclusively contains the elements titanium and oxygen is referred to as titanium oxide.
With the chemical formula TiO2, titanium dioxide, sometimes referred to as titanium(IV) oxide, is an inorganic substance. It is also known as titanium white, Pigment White 6 (PW6), or CI 77891 when used as a pigment.
Step 1: Given data
Number of moles of titanium (IV) oxide in 1 jelly bean (n):7. 69x10^( 18)
Step 2: Calculate the mass (in grams) corresponding to 7. 69x10^( 18) moles of TiO₂
To convert moles to mass, we need a conversion factor. In this case, it is the molar mass of TiO₂: 79.87 g/mol.
7. 69x10^( 18) mol TiO₂ × 79.87 g TiO₂/1 mol TiO₂
= 1.64*10^(20)g TiO₂
when mass is reversely converted to moles then the moles:0.0000128 mole TiO2.
Although mineral forms might seem black, it is a solid that is insoluble in water and is white in colour. It may be used as a pigment in a variety of products, such as paint, sunscreen, and food colouring. Its E number for usage as food colouring is E171.
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Bill Nye: Structure
12. All 206 of our __________________________ are structures.
13. Bases are built _____________________________ so that they can support the structure.
14. When pulling on a rope you are giving it --------------------------------------
15. Tall buildings are _____________________________so they will not fall in an earthquake.
12. All 206 of our bones are structures.
13. Bases are built on solid ground so that they can support the structure.
14. When pulling on a rope you are giving it -tension
15. Tall buildings are seismically reinforced so they will not fall in an earthquake.
What is structure about?An arrangement and organization of related components in a physical object or system, or the organized object or system, is referred to as a structure.
Material structures include both natural and man-made objects, such as biological organisms, minerals, and chemicals, as well as man-made structures like buildings and machines.
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iso c++ forbids comparison between pointer and integer
The system will throw a comparison error if a programmer attempts to compare two different datatypes in the C++ language, is the answer. An address in memory is what a pointer is, although an integer is a separate datatype.
Integral, Floating Point, Character, Character String, and Composite types are the five fundamental categories of data types recognised by the majority of current computer languages. Within each of these broad categories, numerous particular subtypes are established. Integral, Floating Point, Character, Character String, and Composite types are the five fundamental categories of data types recognised by the majority of current computer languages. Within each of these broad categories, numerous particular subtypes are established. Unquoted upper-case terms, such as String, are used to represent data types. Data types can occasionally accept parameters, which makes them more specialised. As an illustration, the data type for strings with at least eight characters is String[8].
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lit the 9 place on earth where frehwater i found, putting them in order from greatet amount to mallet amount
Ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers, streams, and groundwater are the sources of freshwater.
96.5% of all the Earth's water is contained within the oceans as saltwater, while the remaining 3.5% is freshwater lakes and frozen water locked up in glaciers and the polar ice caps.Water also exists in the air as water vapourWater, in rivers and lakes, in icecaps and glaciers, in the ground as soil moisture and in aquifers. The vast majority of water on the Earth's surface is saline water in the oceans. Over 68 percent of the freshwater on Earth is found in icecaps and glaciers, and just over 30 percent is found in groundwater. Only about 0.3 percent of our freshwater is found in the surface water of lakes, rivers, and swamps. The Antarctic ice sheet holds about 90 percent of the fresh water that exists on the Earth’s surface.Go through the given link below to know more about freshwater:-
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Water has the chemical formula H2O. How do the properties of hydrogen (H) and oxygen (O) change when they come together to form water? They gain the ability to become a liquid when they form a water molecule They will both lose electrons when they become part of a water molecule They will no longer burn with they are part of a water molecule They both can become a gas once they combine to form a water molecule
The oxidation-reduction (redox) process that occurs when hydrogen and oxygen combine to generate water is a type of chemical reaction. It is true that when hydrogen and oxygen .
combine to create a water molecule, they acquire the capacity to turn into liquids, although at normal temperature and pressure, hydrogen and oxygen are gases.The oxidation-reduction (redox) process that occurs when hydrogen and oxygen combine to generate water is a type of chemical reaction. It is true that when hydrogen and oxygen . It is true that when they combine to create a water molecule, oxygen and hydrogen both lose electrons. Hydrogen loses one electron while oxygen obtains two electrons. This is also true; hydrogen and oxygen are extremely combustible gases, but when they combine to create a water molecule, they become inflammable and will no longer burn.
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what mass (in grams) of xenon tetrafluoride would be required to react completely with 1.000 g of water?
5.7g of xenon tetrafluoride would be required to react completely with 1.000 g of water.
To solve such questions, we need to find out the number of moles present for the given compunds/molecules. Balancing the equation would be our first step. The balanced equation would be :-
XeF4 + 2H2O → Xe + 4HF + O2XeF4
So, the stoichiometric ratio moles of xenon tetrafluoride and water is 1:2
Given : We have 1g of water
No. of moles of water = given weight/molar weight = 1/18 = 0.055
Let the no. of moles of xenon tetrafluoride present be x.
Balancing the ratios:-
1:2 = x:0.055
x = 0.055/2
x = 0.0275
Hence, the no. of moles of xenon tetrafluoride present is 0.0275
No. of moles = given weight/molar weight
0.0275 = required weight / 207
Hence, mass of xenon tetrafluoride = 0.0275 x 207 = 5.6925g , we can say almost 5.7g is required.
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