Venus is the second planet from the Sun and is named after the Roman goddess of love and beauty.
Why does Venus have the largest gravitational attraction of the inner planets?Venus has much lower mass as compared to other planets. The distance between the Earth and Venus is much shorter as compared to the distance between Earth and Jupiter. Similarly, the gravitational force of each of these planets on objects on the surface of Earth is largest for Jupiter.
The radius of Venus is 4.6023×108 km2, the mass of Venus is 4.8675×1024 kg, and has a density of 5.243 g/cm3 so that's why Venus is equivalent in size, mass and density of the Earth. So that's why the gravity on Venus is very close to that of Earth.
So we can conclude that Venus is the second planet from the Sun and is named after the Roman goddess of love and beauty.
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The average atomic mass of silver is 107.8682 amu. the fractional abundance of the lighter of the two isotopes is ________.
The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is 0.5185.
The metal has always been in perfect plenty. Both heavier and lighter particles have a combined abundance of 1.
Assume that a is the heavier particle's abundance.
The lighter particle will have an abundance of = 1-a.
Calculations for the element's atomic mass with isotopes go like this:
Average atomic mass equals the sum of the abundance of isotope 1 and isotope 2 masses.
107.8682 amu is the specified average atomic mass.
Lighter isotope 1 has a mass of 106.90509 amu.
The heavier isotope has a mass of 108.9047 amu.
putting the values :
107.8682 = 106.90509 (1 - a) + 108.9047a
107.8682 = 106.90509 - 106.90509a + 108.9047a
107.8682 - 106.90509 = 1.99961a
0.96311 = 1.99961a
a = 0.48
Thus, 0.48 is the heavier particle abundance.
Lighter particle abundance = 1 - a
The density of lighter particles is equal to 1 - 0.48.
Lighter particle abundance = 0.518
The lighter particle has a percent abundance of 51.8%.
The lighter of the two isotopes has a fractional abundance of 0.5185.
Question:
Silver has two naturally occurring isotopes with the following isotopic masses: 10747Ag 10947Ag 106.90509 108.9047 The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is ________. Silver has two naturally occurring isotopes with the following isotopic masses: Ag Ag 106.90509 108.9047 The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is ________. 0.24221 0.48168 0.75783 0.90474 0.51835
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How is it possible to eat acidic things without changing your blood pH? Select all that apply
It is possible to eat acidic things without changing your blood pH because the body contain buffers which help to neutralize acids; option A.
What are buffers?Buffers are solutions which resist changes in their pH when small amounts of acid or base are added to it.
Buffers are prepared from a mixture of a weak acid and its salt or a weak base and it salt.
Buffers act by neutralizing acids or bases to form water.
In the body, there are natural buffers which help to keep the pH of the blood fairly constant.
The buffers found in the body include:
plasma proteins buffer system.hemoglobin buffer system.phosphate buffer, bicarbonate buffer system, andcarbonic acid buffer system.When acidic substance are taken into the body, the buffer system of the body acts to neutralize the acid to form water. Similarly, when basic food substances are taken into the body, the buffer systems in the body neutralize the bases to from water.
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A sample of small, soluble organic molecules was analyzed and found to contain the elements carbon, oxygen, hydrogen and nitrogen. it is most likely that the molecules were?
The sample most likely to be a protein .
Amino acids, which are smaller building blocks of proteins, are linked together in lengthy chains to form proteins. To create a protein, 20 distinct kinds of amino acids can be mixed. Each protein's precise function and distinctive 3-dimensional structure are determined by the order of the amino acids.
Combinations of three DNA building units (nucleotides), which are dictated by the order of genes, are used to code for amino acids.
The main functions of the proteins are determined below:-
proteins are responsible for a Biochemical reaction to happen.Some proteins are hormones ,which acts as messengers in our body.have main role in building immuno system, helps to form immuniglubolins or antibodies.Transports and store nutrients.helps in overall growth and development of the body.To learn more about protein, refer this link
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58
The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the
pressure of the gas?
O It decreases by a factor of four.
O It increases by a factor of four.
O It decreases by a factor of eight.
O It increases by a factor of eight.
Mark this and return
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The pressure of gas will increase by a factor of 4.
When absolute temperature of a gas is increased 4 times while maintaining constant volume, The pressure of the gas is increased by a factor of 4.
This can be explained by Gay-Lussac Law, which states that at any constant volume, the pressure of the gas will be directly proportional to the temperature for a given gas.
PV=nRT ,
Gay-Lussac law explains the relationship between temperature and pressure at constant volume.
P ∝ T => P1 / T1 = P2 / T2
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a solution of toluene (c₇h₈) in 301 g of cyclohexane (c₆h₁₂) has a boiling point of 90.30 °c. what quantity in moles of toluene are in the solution? (for cyclohexane kb
There are 0.96 moles of toluene are in the solution of toluene (C₇H₈) in 301 g of cyclohexane (C₆H₁₂) having a boiling point of 90.30°C.
Given data -
Boiling point of cyclohexane = 90.30°C
Mass of cyclohexane = 301 g
Kb of cyclohexane = 2.92°C/m
Tb of cyclohexane = 80.90°C
Using the equation,
m = ∆Tb
Kb
where,
m is molality of the solution,
∆Tb is the change in boiling point of cyclohexane -
90.30 ° C - 80.90 °C = 9.40 °C
Kb is the boiling point elevation constant of cyclohexane, 2.92 °C/m
Molality (m) = 9.40 = 3.22 mol/kg
2.92
Number of moles of toluene = molality x mass of cyclohexane (in kg)
= 3.22 x 301
1000
Number of moles of toluene = 0.96 mol
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PLEASE HELP 30 POINTS
For the element iron
Answer: Answer
Iron is a chemical element with symbol Fe and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in front of oxygen, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust.
Explanation:
Hope this helps!
Answer:
iron:
group 8
4 orbitals
electrons per shell:2,8,14,2
26 electrons
8 valence electrons.
Explanation:
iron is in the 8th group in the periodic table because it is a transition metal and their valence shells have 8 electrons.
It has 4 electron shells because the first one can hold two electrons, the second has 8 and so on.
The total number of electrons is 26, which is equal to number of protons.
Valence electrons are in the outermost shell.
Oxygen (o2) gas within a piston-cylinder assembly undergoes and expansion from a valume v1 = 0.01 m3 to a volume v2=0.03m3. the reltionship between pressure and volume during the process is p=
The initial and final pressures are 9 bar and 5 bar and work transfer is 12.5916 kJ.
To find initial and final pressure, we will keep the value of initial and final volume in the given formula.
For the case of initial pressure -
p = AV⁻¹+B
p = (0.06÷0.01)+3
p = 6+3
p = 9 bar
For the case of final pressure -
p = (0.06÷0.03)+3
p = 2+3
p = 5 bar
Now, calculating the work transfer -
The formula to be used here is -
[tex]W = \int\limits^1_2 {p} \, dV[/tex]
Keep the values in formula to find the value of work transfer -
W = [tex]\int\limits^2_1 {(\frac{0.06}{V} +3)} \, dV[/tex]
W = 0.06 (ln 0.03÷0.01)+3(0.03-0.01)
On solving the integration we get -
W = 12.5916 kJ
Hence, the initial and final pressures are 9 bar and 5 bar and work transfer is 12.5916 kJ.
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The complete question is -
Oxygen (O₂) gas within a piston-cylinder assembly undergoes an expansion from a volume V₁ = 0.01 m³ to a volume V₂ = 0.03 m³. The relationship between pressure and volume during the process is p = AV⁻¹+B, where A = 0.06 bar-m³ and B = 3.0 bar. For the O₂, determine the following:
(a) the initial and final pressures, each in bar
(b) the work, in kJ
I need help with this too
The mixture of isotope to produce this average mass is is is 50% Cl-35 and 50% CI-37.
Chlorine has two stable isotopes chlorine 35, and chlorine37, with chlorine 35 accounting for about three of the four naturally occurring chlorine atoms. Chlorine 36, also known in nature, is a radioactive isotope with a half-life of about 30,000 years.
Chlorine has two stable isotopes. Cl-35 and Cl-37 with atomic weights of 34.96 and 36.95 respectively. Chlorine has an atomic weight of 35.5 instead of 35 because it has what is called an isotope.
The main difference between chlorine 35 and 37 is that chlorine 35 has 18 neutrons per nucleus while chlorine 37 has 20 neutrons per nucleus. To calculate the proportion of each isotope in a sample of an element, chemists typically divide the number of atoms of a particular isotope by the total number of atoms of all isotopes of that element and multiply the result by 100.
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3. draw the lewis structure for these anions. each anion is a conjugate base of an acid. (e) hco3─ (h attached to one of the o’s) (f) so32─
For lewis structure of HCO₃⁻ it has 24 valence electron and for SO₃²⁻ has 26 valence electron
A lewis Structure is a very simplified representation of the valence shell electrons in a molecule
Here given compound is HCO₃⁻ called as bicarbonate we have to draw the lewis structure of SO₃²⁻ first we have to calculate total valence electron and in that compound H=1 valence electron for C=6 valence electron and for oxygen 18 valence electron
Here, C less electronegative so 4×2=8electon are used means 24-8=16elctron
To complete octet of every element 18 electron are required one more covalent bond to be made so the structure are at one oxygen double bond are seen
In that lewis structure HCO₃⁻ of 7 lone pair=7×2=14 e and 5 covalent bond=5×2=10e total valence electron are 24
For SO₃²⁻ called suphite ion in this compound total 26 valence electron are seen 6+3(6)+2 = 6+18+2= 26 valence electron
Here in that structure sulphur has charge +1 because it has 6 valence electron out of which two are non bonding and 6 are bonding and in oxygen has -1 charge because 6 valence electron in nonbonding and 2 are in bonding
+1 on sulphur and -1 are on oxygen
That's why the lewis structure of HCO₃⁻ and SO₃²⁻ are
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What is the major product formed upon treatment of ( r) 2-bromohexane with sodium cyanide?
In this reaction, hexanitrile will be the major product.
A nitrile is created when a halogenoalkane heated under reflux with a solution of sodium or potassium cyanide in ethanol has its halogen replaced by a -CN group. Heating under reflux is the procedure of heating with a condenser placed vertically in the flask to prevent the mixture's volatile components from escaping throughout the process. The solvent has a key role. In the presence of water, substitution by -OH rather than -CN is more probable.The substitution is an example of nucleophilic. This time, the halogenoalkane is the only species present in the reaction's slow step. It's uses both SN1 and SN2 reaction.CH₃ − CH₃(Br) − CH₃ − CH₃ − CH₃ − CH₃ + NaCN = CH₃ − CH₃(CN) − CH₃ − CH₃ − CH₃ − CH₃
Thus, the major product of reaction of 2-bromohexane with sodium cyanide is hexanitrile.
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Use the table of observed changes to answer the question.
Change # Reacts with another substance? Temperature change? Gas, sound, or light produced? New substance formed?
1 yes yes yes yes
2 no yes yes no
3 yes yes yes yes
4 no no no no
Which changes shown in the table are physical changes?
(1 point)
2 and 4
2 and 3
1 and 2
1 and 4
1) Chemical change
2) Physical change
3) Chemical change
4) Physical change
What is a chemical change?A chemical change occurs when a new substance is formed. There is a rearrangement of atoms of the substance as the new substance is formed. We know that the indicators that a chemical change has occurred are the changes in the temperature, color and appearance of sound sometimes.
On the other hand, when a physical change occurs, there is no rearrangement of atoms and there is no formation of a new substance. The physical appearance of the substance may change.
Now let us respond to the kind of change that happened in each case;
1) Chemical change
2) Physical change
3) Chemical change
4) Physical change
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these are two of the most energy-demanding operations in the malthouse and brewery. group of answer choices packaging fermentation cooling wort boiling malt kilning
boiling malt kinling are two of the most energy-demanding operations in the malthouse and brewery.
What is malthouse and brewery?
A facility where cereal grain is turned into malt by soaking it in water, allowing it to sprout, and then drying it to inhibit further growth is known as a malt house, malt barn, or maltings. The malt is utilised in the production of beer, whisky, and some meals. During the 20th century, traditional malt houses were mainly replaced by more automated production. A music hall has been made of many former malt houses, including Snape Maltings in England.
Approximately 60% of the primary energy consumed by the malt beverage sector is made up of natural gas and coal (Energy Information Administration (EIA), 1997; National Petroleum Council (NPC), 2003). These fuels are typically utilised as inputs into boilers to provide steam for different processes and for the generation of on-site electricity.
One of the most energy-intensive processes in the malthouse and brewery is the boiling of malt kinling.
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In the correct order, what are the three general steps in the mechanism of a claisen reaction?
Enolate synthesis, nucleophilic addition, and elimination are the three basic steps in the mechanism of a Claisen reaction.
What is Nucleophilic addition reaction?
A chemical molecule having an electrophilic double or triple bond combines with a nucleophile in a nucleophilic addition reaction, breaking the double or triple bond.
A nucleophile attacking the electrophile's location in the reactant molecule and displacing it to generate a product is known as nucleophilic substitution. An electrophile, which is an electron-deficient species that accepts electrons, is present in an electrophilic addition reaction.
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Change the following values to ordinary numbers. a 5.5×10−6 b 2.9×102 c 1.115×104 d 1.412×10−3 e 7.2×101
The following value to the ordinary numbers:
a - 5.5 × 10⁻⁶ = 0.0000055
b - 2.9 ×10² = 2900
c - 1.115 × 10⁴ = 11150
d - 1.412 × 10⁻³ = 0.001412
e - 7.2 × 10¹ = 72
How do you convert to ordinary numbers?To convert standard form numbers to regular form: Give a regular number a power of 10. It is necessary to multiply the decimal number by this power of 10. You should type your number like a regular number.
What are decimals number?A decimal is one of the number types in mathematics that has a fractional component and a complete integer split by a decimal point. The point that appears between the components of a whole integer and a fraction is known as the decimal point. 34.5 is an example of a decimal number.
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Identify the expected major product from the treatment of 1-pentyne with 2 equivalents of hbr. 1-bromo-1-pentene 2-bromo-1-pentene 1,1-dibromo pentane 2,2-dibromopentane 1,2-dibromopentane
When we treated 1-pentyne with 2 equivalent of HBr, the formation of 2-Bromo-1-pentene takes place. This reaction follows Markonikov's rule, which states that incoming nucleophile is added to the carbon atom, which has less hydrogen.
What is hydrogen called?Protium is the name of the common hydrogen isotope (H), while Deuterium (a proton and a neutron) and Tritium are the other two isotopes (a protron and two neutrons). Only the isotopes of hydrogen have been given distinct names. Nuclear fusion reactors use both deuterium and tritium as fuel.The simplest chemical element is hydrogen (H), a colorless, odorless, tasteless, and combustible gaseous substance.Hydrogen-containing inorganic substances with biological significance include water (H2O) and hydrochloric acid (HCl, which is produced by the stomach). Fundamentally speaking, organic compounds are described as substances with carbon atoms and Carbon-Carbon (C-C) and Carbon-Hydrogen (C-H) bonds.Pure water that has additional hydrogen molecules added to it is called hydrogen water. The most abundant molecule known to man is hydrogen (H2). It is a gas that has no flavor, odor, or color. In any case, a Japanese research team discovered in 2007 that hydrogen gas ingested could act as a cancer preventative (antioxidant).When we treated 1-pentyne with 2 equivalent of HBr, the formation of 2-Bromo-1-pentene takes place. This reaction follows Markonikov's rule, which states that incoming nucleophile is added to the carbon atom, which has less hydrogen.
1-bromo-1-pentene.
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a liquid solvent is added to a flask containing an insoluble solid. the total volume of the solid and liquid together is 85.0 ml.85.0 ml. the liquid solvent has a mass of 44.3 g44.3 g and a density of 0.865 g/ml.0.865 g/ml. determine the mass of the solid given its density is 1.75 g/ml.
If the total volume is 85ml, then the mass of the solid is 59.15g.
Given:
Total volume = 85ml
Liquid solvent mass = 44.3g
Liquid solvent density = 0.865g/ml
Density of solid = 1.75 g/ml
Density = Mas / Volume
0.865 = 44.3 / Volume
Volume = 44.3 / 0.865
Volume = 51.2
Volume of solid = 85 - 51.2
= 33.8
Density = Mass / Volume
1.75 = Mass / 33.8
Mass = 59.15
What is mass?
A physical body's mass is the total amount of matter it contains. Inertia, or the body's resistance to acceleration when a net force is applied, is another property that may be measured. The gravitational pull of an object to other bodies is also influenced by its mass. The kilogram serves as the primary mass unit in the SI.
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How many kingdoms are in the domain Eukarya?
one
four
six
nine
Answer:
Four kingdoms:
The kingdoms in the domain Eukarya are Protista, Fungi, Plantae, and Animalia.
Answer: Four Kingdoms! I hope you get this question!
Explanation:
The ph of a 0.10 m monoprotic acid ha is measured to be 3.5. what is the ka value of this acid?
The ph of a 0.10 m monoprotic acid ha is measured to be 3.5. The ka value of this acid is 10^(-6).
What is pH?
The hydrogen ion concentration is measured using the pH scale. The pH values, which range from 0 to 14, are assigned to it. Therefore, we may say that the pH value is a number that represents how acidic or basic a solution is.
A solution with a pH below 7 is referred to as acidic, and one with a pH over 7 is referred to as basic, or alkaline.
HA⇌H+ + A−
ka= [H +][A −]/[HA]
For weak acids, [H+] = [A-]
[H+] = 10^(-pH)
Thus, Ka = {10^(-3.5)}^2/0.10 = 10^(-6)
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How much heat (in kj) is needed to convert 514 g fe2o3 into pure iron in the presence of excess carbon?
Heat is required to convert fe2o3 into pure iron. Heat required to convert 514 g fe2o3 into pure iron in the presence of excess carbon for is 753.02kJ.
What is heat?Heat is amount of energy that is transmitted because of a change in temperature from one structure to its surroundings. Heat is transition from one medium or object to another of kinetic energy, or from an energy source to a medium or object. This is amount of heat needed to increase the temperature by one degree Fahrenheit of a pound of pure liquid water.
Heat is source of energy that is transmitted (flowing from the high temperature system to the low temperature system) between systems or objects of different temperatures. It is also known as the thermal energy or heat energy. The heat is typically measured in Btu, calories or joules.
The Heat of Reaction (also known and Enthalpy of Reaction) is change in the enthalpy of a chemical reaction that occurs at a constant pressure. It is a thermodynamic unit of measurement useful for calculating amount of energy per mole either released or produced in a reaction. Since enthalpy is derived from the pressure, volume, and internal energy, all of which are state functions, enthalpy is also a state function.
2Fe2O3 (s) + 3C (s) ⇒ 4Fe (l) + 3CO2 (g)
ΔH°= +467.9kJ
Using the unitary method,
2 moles of Fe2O3 requires = 467.9kJ heat
2* 159.69g Fe2O3= 467.9kJ heat
319.38g Fe2O3 requires = 467.9 kJ heat
hence, heat required for for 514g of Fe2O3 = [tex]\frac{514}{319.38}*467.9kJ[/tex]
heat required for 541g Fe2O3 = 753.02kJ
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Aluminum finds application as a foil for wrapping food stuves. Why?
Answer:
it keeps the heat in and the bugs and flys out
Explanation:
A+0.400+m+acid+solution,+ha(aq),+has+a+percent+ionization+of+7.50%.+what+is+the+value+of+ka,+the+acid+ionization+constant+of+ha(aq)?
The value of Ka is 2.25 × 10⁻³.
What is ionization constant?A dissociation constant is a particular kind of equilibrium constant used in chemistry, biochemistry, and pharmacology to measure an object's propensity to break down into its component parts, such as when a complex disintegrates into its component molecules or a salt disintegrates into its component ions.
K is a constant that depends on the equilibrium between ions and non-ionized molecules in a solution or liquid. – also known as the dissociation constant.
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How many electrons can be found with the principal quantum number n=3 in a suitably heavy atom?
There is one orbital in an s subshell with 2 electrons, three orbitals in a psubshell with 2 electrons each, and 5 orbitals in a dsubshell with 2 electrons each. The total no. of electrons is 18 (maximum).
How many electrons with the principal quantum number n 3 can be in an atom?This means the individual orbital where n = 3, l = 2 will be '3d' because 3d orbitals have five subshells and the principal quantum number is 3. - We understand that a 3d orbital can adjust 10 electrons (each subshell can house two electrons). - Therefore the no. of electrons are n = 3, l = 2 are 10.
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Enter the molecular equation representing aqueous nitric acid and aqueous ammonia reacting.
The molecular equation representing aqueous nitric acid and aqueous ammonia reacting is :
NH₃(aq) + HNO₃(aq) → NH₄⁺(aq) + NO₃⁻(aq)
NH₃(aq) + HNO₃(aq) → NH₄NO₃(aq)
An acid-base reaction is not the exchange of a hydrogen atom H. It is the exchange of a hydrogen ion (or proton) H⁺.
This reaction combines two ions produced into a single compound. In aqueous solution, the products should be NH⁴⁺ and NO³⁻, since ammonium nitrate is freely soluble in water. Thus, this reaction would be reasonable if reaction does not occur in aqueous solution.
So, the net ionic equation is,
NH₃(aq) + HNO₃(aq) → NH₄⁺(aq) + NO₃⁻(aq)
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select the option that places remaining contributors in the correct order, from highest to lowest according to the percentages of greenhouse gases they emit.
From highest to lowest according to the percentages of greenhouse gases they emit.
Residential and commercial buildings, transportation, agriculture, forestryTransportation, forestry, residential and commercial buildings, agricultureForestry, agriculture, transportation, residential and commercial buildingsAgriculture, transportation, forestry, residential and commercial buildingsWhat are greenhouse gases?
The main greenhouse gases in Earth's atmosphere are water vapour (H2O), carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and ozone. A greenhouse gas (GHG or GhG) is a gas that absorbs and emits radiant energy in the thermal infrared range (O3). Without greenhouse gases, the average surface temperature of the Earth would be closer to 18 °C (0 °F) than it is today, which is 15 °C (59 °F). Additionally, greenhouse gases are found in the atmospheres of Venus, Mars, and Titan.
Thus the correct order goes as:
Forestry, agriculture, transportation, residential and commercial buildings
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Convert 520 inches to cm using the conversion factor that 1 inch = 2.54 cm.
1320 c
O 45.59 cm
O 0.005 cm
O205 inches
Answer:
Explanation:
520:2.54=204.7 round to 205 the answer=205 cm=520 inches
compound present in many foods has the formulka c44h86o8np. to which class of molecules does this compound belong?
Lipids the compound present in food with formula C₄₄h₈₆O₈NP
Elaborating :The compound with a formula C₄₄H₈₆O₈NP is understood as phosphatidylethanolamine. it's the second most abudant phospholipid in animal and plant lipid, after phosphotidylcholine. It is present in many foods. Also a main lipid component of microbial membranes. it's found in all living cells and compose of 25% of all phospholipids.
What is the role of lipids in food?
They are important in the diet as energy sources and as sources of essential fatty acids and fat-soluble vitamins, which tend to accompany fats. They also contribute satiety, flavor, and palatability to the diet.Dietary lipids are primarily oils (liquid) and fats (solid). Commonly consumed oils are canola, corn, olive, peanut, safflower, soy, and sunflower-seed oil . Foods rich in oils include dressing , olives, avocados, spread , nuts, seeds, and a few fish. Fats are found in animal meat, dairy products, and cocoa butter
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How do you know when a electron transition will result in the emission of light
The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level. When the electron changes from n=3 or above to n=2, the photons emitted fall in the Visible Light region of the spectra. We call these lines Balmer's Series.
What is the iupac name of the following compound?
a. (s)-2-bromo-2-vinylpentane
b. (r)-2-bromo-2-vinylpentane
c. (r)-3-bromo-3-methyl-1-hexene
d. (s)-3-bromo-3-propyl-1-butene
The IUPAC name of the compound is (r)-3-bromo-3-methyl-1-hexene.
Determine the chain's parent. In this instance, the 6-carbon chain begins at the alkene and extends to the right after looping through the chiral center. Hex-1-ene is the result of the prefix "6" and the alkene, which starts at position "1".Substituents. Since they are both at the 3-position in this instance, they will be sorted alphabetically: 3-bromo-3-methylChiral Center at position 3. According to IUPAC guidelines, the bromine atom is represented by the number 1, the carbon atom double-bonded to the following carbon atom by the number 2, the carbon atom single-bound to the following carbon atom by the number 3, and the methyl group by the number 4. Imagine a tetrahedron in your thoughts and turn it such that the numbers 1-3 are facing you as you look at the molecule.When put together we get: (3R)-3-bromo-3-methylhex-1-ene.Or (r)-3-bromo-3-methyl-1-hexene.
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A chemist dissolves 793 of pure nitric acid in enough water to make up of solution. calculate the ph of the solution. round your answer to significant decimal places.
pH of the given solution will be: 3
Since pH is essentially a measure of the concentration of hydrogen ions in a substance, the letters pH stand for potential of hydrogen.pH less than 7 are acidic while pH greater than 7 are alkaline.We can find out pH of a solution or substance by negative logarithm of H+ ions present in that solution.Given,
mass of nitric acid is 773mg = 0.773g
Molar mass of nitric acid is 63.01 mol
volume of solution is 180dm³
First we will obtain the concentration of Nitric acid by formula n = CV
C is the concentration
V is the volume of the solution
mass of acid is already provided in the question
we know that
no. of moles = given mass / molar mass
no. of moles of nitric acid = 0.773 / 63.01 = 0.12
C = n/V
C = 0.12 / 180 = 0.0006
We can find out pH by negative logarithm of H+ ( concentration)
pH = - log [ H+ ]
pH = - log [ 0.0006 ]
pH = 3.22 = 3
Therefore, pH of the solution is 3 (acidic)
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you have been observing an insect that defends itself from enemies by secreting a caustic liquid. analysis of the liquid shows it to have a total concentration of formate plus formic acid (Ka
pH of the buffer solution is 1.76.
Chemical dissociation of formic acid in the water:
HCOOH(aq) ⇄ HCOO⁻(aq) + H⁺(aq)
The solution of formic acid and formate ions is a buffer.
[HCOO⁻] = 0.015 M; equilibrium concentration of formate ions
[HCOOH] + [HCOO⁻] = 1.45 M; sum of concentration of formic acid and formate
[HCOOH] = 1.45 M - 0.015 M
[HCOOH] = 1.435 M; equilibrium concentration of formic acid
pKa = -logKa
pKa = -log 1.8×10⁻⁴ M
pKa = 3.74
Henderson–Hasselbalch equation: pH = pKa + log(cs/ck)
pH = 3.74 + log (0.015 M/1.435 M)
pH = 3.74 - 1.98
pH = 1.76
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