On adding more CO2 equilibrium shifts to left, adding more oxygen the equilibrium shift to right, increasing a temperature will shift the equilibrium to left and adding the catalyst will not affect the equilibrium.
According to Heisenberg Uncertainty Principle, if the equilibrium of a system of reaction is disturbed by making any changes in the property the reaction will shift into that direction by itself that stabilizes the equilibrium again.
According to the reaction,
CH4O + O2 = H2O + CO2 + Heat
a. Adding more CO₂ will shift the reaction towards the left side or we can say that adding carbon dioxide into the system will shift the reaction towards the reactant side. Because the concentration of carbon dioxide on the product side has increased, the equilibrium is disturbed so in order to stabilize the equilibrium again the reaction will shift towards the reactant side.
b. Adding more oxygen means that we are adding more amount of reactants which disturbs the equilibrium of the reaction so to stabilize the equilibrium again the reaction will shift towards the product side.
c. Increasing the temperature of the equation means that we are giving heat to the system which means that the equation or the system will shift toward the product side because the reaction is exothermic in nature.
d. Adding a catalyst will not affect the equilibrium of the reaction it will only increase the rate of the reaction.
To know more about equilibrium, visit,
https://brainly.com/question/517289
#SPJ4
an organic chemistry student forgot to pre-weigh the erlenmeyer flask containing crude acetanilide from week one. what is the most accurate method for this student to obtain the mass of crude acetanilide?
The most accurate method of weighing for this student to obtain the mass of crude acetanilide without pre-weighing is by taking the difference between weights of the crude acetanilide with the flask and the empty flask.
What are some of the different ways of weighing compounds in laboratory?
Direct weighing: Set the weighing scale to zero and then place the vial on the scale and set to zero again. Then place the compound on in the vial to measure the mass.Weighing by difference: It is one of the most accurate methods to weigh. it involves repetitive weighing of the vial which contains the sample. The sample is transferred to another container to get the desired mass of the solid.The most accurate way of weighing the crude acetanilide without pre-weighing is to weigh the crude acetanilide with the Erlenmeyer flask and then empty it completely and weigh the empty flask again. Then calculate the difference to get the mass of crude acetanilide.
Therefore, the weighing by difference method can be used to measure the weight of the crude acetanilide.
To learn more about weighing in the laboratory click on the link https://brainly.com/question/18442391
#SPJ4
How many grams of water can be heated from 28.0°C to 74.5°C when 2.19 kJ of heat is absorbed?
Answer:
1.12 x 10⁻⁵ grams H₂O
Explanation:
To find the mass of water, you need to use the following equation:
Q = mcΔT
In this equation,
-----> Q = heat (J)
-----> m = mass (g)
-----> c = specific heat capacity (J/g°C)
-----> ΔT = T₂ - T₁ = change in temperature (°C)
"T₁" represents the initial temperature and "T₂" represents the final temperature. The specific heat capacity of water is 4.186 J/g°C. Before plugging the variables into the equation and solving for "m", you need to convert the energy from kilojoules (kJ) to joules (J).
1,000 kJ = 1 J
Q = 2.19 kJ / 1,000 = 0.00219 J c = 4.186 J/g°C
m = ? g ΔT = 74.5°C - 28.0°C = 46.5°C
Q = mcΔT <----- Given equation
0.00219 J = m(4.186 J/g°C)(46.5°C) <----- Insert variables
0.00219 J = m(194.649) <----- Multiply 4.186 and 46.5
1.12 x 10⁻⁵ = m <----- Divide both sides by 194.649
11.25 grams of water can be heated from 28.0°C to 74.5°C when 2.19 kJ of heat is absorbed.
What is Specific Heat?The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.
It is given by the formula -
Q = mcΔT
where, Q = amount of heat
m = mass
c = specific heat
ΔT = Change in temperature
Given,
Amount of heat = 2.19kJ
Initial Temperature = 28
Final Temperature = 74.5
Q = mcΔT
2190 = m × 4.18 × ( 74.5 - 28 )
m = 11.25 g
Therefore, 11.25 grams of water can be heated from 28.0°C to 74.5°C when 2.19 kJ of heat is absorbed.
Learn more about Specific Heat, here:
https://brainly.com/question/11297584
#SPJ2
A volume of 25cm3 of a carbonate solution of concentration 0.2mol dm-3 was neutralized by 20 cm3 of acid of concentration 0.5 mol dm-3. The mole ratio in which the reactants combine is?
1 mol of carbonate to 1 mol of acid
1 mol of carbonate to 2 mol of acid
2 mol carbonate to 1 mol of acid
3 mol of carbonate to 1 mol of acid
The correct mole ratio of the reaction is 1 mol of carbonate to 2 mol of acid. Option B
What is the mole ratio?We know that the ratio of the reactants that are involved in a reaction is what we call the mole ratio. We have to note that a neutralization reaction is the type of reaction that occurs between an acid and a base. We also have to recall that is vita to be able to write the balanced reaction equation before we can be able to find the mole ratio.
Now, we have the balanced reaction equation as;[tex]CO_{3} ^2-(aq) + 2H^+(aq) ----- > H2O(l) + CO2(g)[/tex]. The reaction is thus a 1:2 reaction for the carbonate and acid.
Learn more about mole ratio:https://brainly.com/question/15288923
#SPJ1
if you require 33.38 ml of 0.1936 m n a o h naoh solution to titrate 10.0 ml of h c 2 h 3 o 2 hcx2hx3ox2 solution, what is the molar concentration of acetic acid in the vinegar?
The molar concentration of acetic acid in vinegar is 64.62 M
Titration is known as the quantitative concentration of a given solution. It is also known as the quantitative analysis.
In the given condition we have 33.38ml of 0.1936 molar of NaoH solution to titrate 10ml of HC2H3O2.
Therefore,
HC2H3O2 + NaoH - H2O + NaC2H3O2
The concentration of the given base (NaoH) = 0.1936 molar.
The volume of the given bae = 33.38ml.
The volume of acetic acid = 10ml.
We can denote the concentration and volume of the given samples as,
Ca = concentration of acetic acid
Cb = concentration of the base( NaoH)
Va = volume of acetic acid
Vb = volume of base.
By putting the value in equation, we get
Ca x Va = Cb x Vb
since, we need to find Ca, we need to shift the Va to the right-hand side.
Therefore,
Ca = Cb x Vb/ Va
Substituting the values we get,
Ca= 0.1936 x 33.38/ 10
Ca = 64.62 M
Therefore, the molar concentration of acetic acid is 64.62M
Learn more about titration and related numerical at,
https://brainly.com/question/19567949
#SPJ4
Which equation represents sublimation?
1 Hg(2)→ Hg(s)
2 H₂O(s)→ H₂O(g)
3 NH3(g) → NH3( )
4 CH4(2)→ CH4(g)
The equation which represents sublimation in the given option is,
H2O(s) → H2O(g).
What is sublimation?
Sublimation is the process of the conversion of substance in solid state directly to gaseous state without going to the liquid state. An example for sublimation is dry ice which is also called as solid carbon dioxide. At ordinary temperature, dry ice gets converted from solid to gaseous form without going through the liquid state.
In sublimation process, the water is in the solid state which is getting converted into the gaseous state which is water vapor. In water, the snow or ice change directly to vapour from solid form.
Hence, water getting converted from solid state to gaseous state is the sublimation process. Here H2O (s) is getting converted into H2O (g). Therefore, option 2 is the correct answer.
To learn more about sublimation from the given link https://brainly.com/question/8663237
#SPJ13
suppose a beaker of water is heated from the top. which is more likely to occur in the water: thermal energy transfer by conduction or convection?
Answer: convection
Explanation:
why are buffer solutions used to calibrate the ph meters rather than dilute solutions of acids and bases of known concentration?
Buffer solutions are used to calibrate pH meters because they resist changes in pH. When you use a pH meter to measure pH, you want to be sure that if the meter says pH = 7.00, the pH really is 7.00. So you use solutions of known pH and adjust the meter to display those values.
What is buffer solution
When modest amounts of an acid or an alkali are introduced, the pH of a buffer solution will not change.
solutions for buffering acid
Simply said, an acidic buffer solution is one that has a pH lower than 7. A weak acid and one of its salts, frequently a sodium salt, are typically used to create acidic buffer solutionsEthanoic acid and sodium ethanoate in solution would be a typical example. The solution in this instance would have a pH of 4.76 if the acid and salt were present in equal molar amounts.
However the concentrations were, as long as they were the same, it wouldn't matter.
To learn more about buffer solution do follow
https://brainly.com/question/8676275
#SPJ4
explain what is happening at a molecular level during the dutch-process. b. rank the molecules from least likely to be present after the dutch process to most likely to be present after the dutch process. c. using the information above and your knowledge of acid-base chemistry provide an explanation for your rankings that addresses how you used structure to solve this problem. do not just quote pka values.
a) the Dutch process at the molecular level Pyrol and benzyl alcohol do not react with NaOH.
b) The molecules are ranked from those that are least likely to be present after the Dutch process to those that are most likely to be present after the Dutch procedure Pyrrol is more likely to be present than butyric acid, which has a lower likelihood of being there.
c) Butyric acid's carboxylic acid is removed using NaOH.
The acidic chemicals with a bitter taste are washed in the Dutch procedure using a strong base like NaOH. Basic substances are not cleansed and only very acidic substances are washed thoroughly. However, vanillin is only somewhat acidic, thiophenol is less acidic, butyric acid is acidic, benzyl alcohol is neutral, and pyrrol is basic.
a) Benzyl alcohol and pyrrol do not react with NaOH. However, butyric acid combines with it to produce sodium butyrate (CH₃CH₂CH₂COONa), vanillin creates its sodium salt ((2-OCH₃,4-CHO)C₆H₃ONa), and thiophenol creates sodium benzenethiolate (C₆H₅SNa).
b) Butyric acid is least likely to be present and pyrrol is most likely to be present. Butyric acid is followed in increasing order of presence by vanillin, thiophenol, benzyl alcohol, and pyrrole.
c). NaOH is used to wash away the carboxylic acid in butyric acid. Due to the aromatic ring, vanillin and thiophenol are acidic and combine with NaOH to generate a sodium salt that is water soluble. Because it is neutral and pyrrole is basic, neither benzyl alcohol nor pyrrole will react with NaOH.
To know more about molecules, refer to this link:
https://brainly.com/question/7625627
#SPJ4
what would be the molar concentration of a 2.35% solution of sodium hypochlorite? (assume the density of solution to be 1.0 g/ml.)
The solution has a 0.114 M molar concentration.
Using the formula, we can determine the molar concentration from the weight percentage of the solution;
CM = 10 C%w/w d/MM
Where;
Molar concentration is CM,percent concentration C%w/w,Density is d,M = molecular mass.
In place of values, we have;
CM = 10 × 0.85 × 1.0 /74.44
CM = 0.114 M
A solution is a specific kind of homogenous mixture made up of two or more components that is used in chemistry. A solute is a substance that has been dissolved in a solvent is solution , which is the other substance in the mixture.Concentration is calculated by dividing a constituent's abundance by the mixture's total volume. One can distinguish between four different sorts of mathematical descriptions: mass concentration, molar concentration, number concentration, and volume concentration.
learn more about Molar concentration here:
https://brainly.com/question/21841645
#SPJ4
At a constant temperature, what is the new volume of a 5.0-L sample of oxygen gas
if the pressure
is changed from 0.50 atm to 0.25 atm?
Answer:
5.0 L
Explanation:
What causes the Moon to be illuminated?
Answer:
The moon reflects the light from the sun
Explanation:
Answer:
it reflects light from the sun
Explanation:
after performing a tlc experiment, a researcher determines the rf value of a component to be 2. he also notes that the solvent travelled a distance of 4cm on the plate. what can you conclude about this experiment?
The conclusion would be that Rf value is wrong.
Rf value refers to the retention factor. It is used in Thin Layer Chromatography, which is the technique to identify molecules based on their polarity. The. rf value is the ratio of distance travelled by solute to the distance travelled by solvent.
Solute can not move faster than solvent, hence, the distance travelled is always less. This means that numerator will be less than denominator making it less than 1. In general, the rf value lies between 0 and 1. Therefore, there is something wrong in the experiment.
Learn more about retention factor -
https://brainly.com/question/24731831
#SPJ4
Which statement below best describes why NASA crashed DART into an asteroid?
The statement that best describes why NASA crashed DART into an asteroid is option A; NASA wanted to know if crashing a satellite into an asteroid would be enough to change the course of the asteroid.
Why is NASA colliding a spaceship with an asteroid?Double Asteroid Redirection Test is the name of the first "planetary defense" test that the US space agency, in collaboration with researchers at Johns Hopkins University, carried out to determine whether it was possible to change the course of an asteroid in deep space if one ever got close enough to threaten Earth.
The 'planetary defense' experiment on the Dart mission seeks to determine whether Armageddon-style impacts can be avoided.
Therefore, The world's first planetary defense technology demonstration, NASA's Double Asteroid Redirection Test (DART), successfully impacted its asteroid target on Monday after spending 10 months in space. This was the agency's first attempt to move an asteroid in orbit.
Learn more about asteroid from
https://brainly.com/question/13832027
#SPJ1
How are radioisotopes used in radiation therapy for cancer?
A. to detect unusual cells
B. to strengthen normal cells
C. to kill fast-growing cells
Answer:
The liquid radiation targets cancerous cells while causing minimal damage to surrounding healthy cells.
how to tell if the aqueous solutions of these salts have a ph greater than, less than, or equal to 7 at room temperature.
Strong bases and weak acids in salts do hydrolyze, raising the pH level over 7. The anion in salt comes from a weak anion.
What salts have pH values under 7?Ammonium chloride (NH 4 Cl) is a salt whose solution has a pH of less than 7. Since potassium carbonate and sodium carbonate are all basic in nature, they all have pH values higher than 7.It could be neutral salt, basic salt, or acidic salt. Strong acid and weak base combine to generate this kind of salt. They have a pH value that is below 7. No, not all salts have a pH of 7.0 in solution and are neutral. Since NH4Cl is an acidic salt with a strong acid and weak base, its pH will be lower than 7.The pH of pure water, which has these ion concentrations in balance, is 7. Since a pH value of 7 denotes a neutral solution, it is significant. This neutral point serves as the benchmark for all other chemicals.To learn more about pH values refer to
https://brainly.com/question/7148834
#SPJ4
Glacier striations (scrapings) were found in the deserts of Africa. What did Wegener suggest about these deserts long ago?
Wegener suggested that the deserts of Africa were once covered in ice and that the striations were formed by the movement of the ice across the desert floor.
Glacier striations are grooves or scratches in the bedrock that have been created by a glacier sliding over the surface. They are typically found in areas where the ice has melted away, revealing the bedrock beneath.
Wegener suggested that the deserts were once wetter and lusher. He proposed that the climate has gradually changed over time, making the deserts arider. This is supported by evidence of ancient riverbeds and lakes in the Sahara Desert.
Glacier striations can be used to help researchers learn about the history of a particular glacier and the climate in the area where it is located. For example, the direction of the striations can indicate the direction the glacier was moving and the depth of the striations can give clues about how deep the glacier was.
To know more about glaciers, click below:
https://brainly.com/question/6666513
#SPJ9
How many moles of H₂ do you need to produce 8 moles of NH3 if you have plenty of N₂? SHOW ALL WORK FOR THIS CALCULATION.
12 moles of H₂ need to produce 8 moles of NH3 if you have plenty of N₂ .
What is a chemical reaction ?
Chemical reaction, the process by which one or more substances (reactants) are transformed into one or more other substances (products). Substances are either chemical elements or compounds. Chemical reactions rearrange the constituent atoms of reactants to produce different substances as products.
Chemical reactions are part of technology, culture, life . Fuel combustion, glass and pottery making, beer , and wine and cheese making are few examples. Activities involving chemical reactions that have been around for thousands of years. Chemical reactions are abundant in a variety of complex processes occurring in the Earth's geology, atmosphere and oceans, and in all biological systems.
The balanced chemical equation is:
N2+3H2→2NH3
From stoichiometry,
2 mol of NH3
is produced from 3 mol of H2
8 mol of NH3 will be produced from = 3/2×8=12 mol of H2
To learn more about the chemical reaction , click the given link ;
https://brainly.com/question/14361631
#SPJ1
5. What is the difference between an orbital, a
sublevel, and an energy level?
Energy levels are the fixed distances of electrons from the nucleus, sublevel is a level that is lower than another level whereas an orbital is the most likely location of an electron present around an atom.
What is orbital, sublevel, and energy level?The sublevels contain carry orbitals. Orbitals are spaces that have a high prospect of containing an electron. An orbital is an area or location where the electrons are present. There can be two electrons in one orbital extreme. Each energy level or shell is divided into many sublevels. Both sublevel and subshell are used interchangeably. The sublevels are constituted by the letters s, p, d, and f. Each energy level has certain sub-levels. Therefore, these circular orbits are called as energy levels or energy shells. The orbits of an atom act for the energy levels of the electrons in it.
So we can conclude that Orbitals and sublevels are both concepts used in chemistry to describe the energy states of electrons.
Learn more about sublevels here: https://brainly.com/question/28581679
#SPJ1
Hexane is more likely to dissolve in octane rather than ethanol.
A. true
B. false
Answer:
The answer to your question is,
A. true
Explanation:
I hope this helps
I am sorry if I am wrong
The percent ionic character of a bond ______ with δen. An arbitrary value of ______ divides ionic from covalent bonding.
As we know that, bond polarity and the ionic character of any compound increases with raise in the difference of the electronegativity.
The percentage of ionic character of the bond increases with δen. An arbitrary value of 50% ionic character separates ionic from covalent bonding.
What does covalent bonding explain?
When two or more atoms share one or more pairs of electrons, a covalent bond is formed. These electrons are attracted to two neutrons and protons simultaneously. A covalent bond is formed when the difference between the electrical configurations of two atoms is too small for an electrochemical reaction to occur and ions to be produced.
What properties do covalent bonds have?
Bonds between atoms in covalent compounds share electrons. They have distinct physical properties, such as lower melting points and electrical conductivity than ionic compounds, due to the sharing of electrons.
To know more about Electronegativity:
brainly.com/question/29217577
#SPJ4
A climatograph of the Western Sahara is depicted here which shows the average rainfall, low and high temperatures over the course of a year. Which features of the Earth most directly contribute to the climate observed in the Western Sahara? Select ALL that apply.
A The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain the Western Sahara.The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain the Western Sahara.
B The tilt of the Earth on its axis gives the Western Sahara direct sunlight during the summer.The tilt of the Earth on its axis gives the Western Sahara direct sunlight during the summer.
C The gravitational pull of the Moon on the Earth diverts water from desert areas to the oceans.The gravitational pull of the Moon on the Earth diverts water from desert areas to the oceans.
D The revolution of the Earth around the Sun prevents rainfall in the areas on the western parts of large continents.The revolution of the Earth around the Sun prevents rainfall in the areas on the western parts of large continents.
E The rotation of the Earth generates winds that are deflected as the Earth moves.
The features of the Earth that most directly contribute to the climate observed in Western Sahara are:
"The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain Western Sahara.The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain Western Sahara." (Option A) ; and "The rotation of the Earth generates winds that are deflected as the Earth moves." (Option E).What is Climate?Climate is an area's long-term weather trend, often averaged over 30 years.
More precisely, it is the average and variability of climatic variables across temporal periods ranging from months to millions of years.
Learn more about Western Sahara:
https://brainly.com/question/7355388
#SPJ1
Which of the following diagram shows a pure substance that is composed of only individual atoms and not molecules?
liquid water
(H₂O)
hydrogen gas
(H₂)
carbon dioxide gas
(CO₂)
argon gas
(Ar)
Answer:
Argon Gas
Explanation:
:)
Can buffer happen with a strong acid and a salt?
The question: 0.2 HCl and 0.2 NaCl
A buffer can not be made from a strong acid and a salt.
What is a buffer?We know that the term buffer has to do with the type of solution that we use to prevent any kind of change in the acidity or the alkalinity of a solution. In order words, the buffer is the type of solution that is used to prevent a change in the pH of the system.
Unfortunately, there can not be a buffer that is made from a strong acid and a strong base. Rather we can only have a buffer that is made from a weak acid and its salt or a buffer that is made from a weak base and its salt.
Since HCl is a strong acid and NaCl is a salt of strong acid, it then follows that the combination of HCl and NaCl can never be used as a buffer.
Learn more about buffer:https://brainly.com/question/22821585
#SPJ1
how do you think the phsyical properties (strength,flexibility, and viscosity) of the polymer would change if more borate ion had been added? why do you think that
The physical properties (strength, flexibility, and viscosity) of the polymer would change if more borate ion had been added is that it becomes thicker and the viscosity will decreases.
The reaction takes place when the borax is added to the solution. when we add the borax in the solution the glue and the borax will combine and form the new substance that is flexible and the springy. The physical properties like strength, flexibility and the viscosity would change.
Thus, The physical properties (strength, flexibility, and viscosity) of the polymer would change if more borate ion had been added is that it becomes thicker and the viscosity will decreases.
To learn more Physical properties here
https://brainly.com/question/28192739
#SPJ4
when temperature and pressure are held constant, volumes can be used in gas-phase reaction stoichiometry because
Because of Avogardo Hypothesis, volumes can be used in gas phase reaction stoichiometry at constant temperature and pressure.
Avogadro's Law (also known as Avogadro's Hypothesis or Avogadro's Principle) is an experimental gas law that relates the volume of gas to the amount of gaseous matter present.
Avogadro's law states that "equal volumes of all gases at the same temperature and pressure have the same number of molecules". At constant temperature and pressure, (mol) of a gas is directly proportional.
For example, if two ideal gases, hydrogen and nitrogen, are mixed in equal amounts, they contain the same amount of molecules. This only happens if they are kept at the same pressure and temperature. This shows the ideal behavior of gases.
Let's look at this law mathematically: the overall law can be written as
V is directly proportional to n
or V = nK , K (a constant)
Amount of gas; “n” is the gaseous substance measured in moles. "k" is a constant defined for a specific pressure and temperature.
Comparing the same gas under different conditions, the law is : V₁/ n₁=V₂/ n₂
The equation shows that the number of moles of gas increases in proportion to the increase in gas volume. Therefore, the total number of atoms or molecules present in a given volume of gas is completely independent of the molar mass or size of the gas.
To learn more about Avogardo Hypothesis, refer:
https://brainly.com/question/26931664
#SPJ4
. if you had a sample of pure polymer, what types of intermolecular forces (imfs) exist between the molecules? (mark all that apply, filling in the bubbles completely!)
Whether they are polar or nonpolar, all molecules exhibit dispersion forces. Atoms and molecules that are bigger and heavier show larger dispersion forces than those that are smaller and lighter.
Look for the molecule with the most polarity, the most electronegative atoms, or the most hydrogen bonding groups if the molecules have identical molar weights and similar intermolecular forces. That one will have the overall stronger IMFs.
Each pair of molecules is as identical as possible except for the fact that one is polar and the other is nonpolar. The polar substance always has the higher boiling point, which denotes stronger attraction forces, or stronger intermolecular forces, between individual molecules.
Learn more about intermolecular forces at
https://brainly.com/question/14276382
#SPJ4
From each of the following ion concentrations in a solution, predict whether a precipitate will form in the solution. (Hint: Calculate Q and compare Q to Ksp)
a) [Ba2+] = 0.020 M, [F-] = 0.015 M Ksp= 1.0x10-6
BaF2(s) Ba2+(aq) + 2F-(aq)
b) [Pb2+] = 0.035 M, [Cl-] = 0.15M Ksp= 1.6x10-5
PbCl2(s) Pb2+(aq) + 2Cl-(aq)
If the ionic constant Q is greater than Ksp the solution forms precipitate if it is lower than the solubility constant Ksp then there will be no precipitate. Both of the given solutions forms precipitate.
What is ionic constant?The ionic constant Q of a solution is the product of molar concentrations of reactants. Solubility constant Ksp is the product of solubilities of the reactant ions when the reaction is in equilibrium.
For the first solution Q = 0.020 M × 0.015M = 0.003.
Ksp = 0.000001. Hence, Q is greater than Ksp which means the solution forms precipitate of BaF₂.
For the second solution Q = 0.035 M × 0.15 M =0.0025.
This is greater than Ksp = 1.6 × 10⁻⁵. Hence, this solution forms a precipitate of PbCl₂.
To find more about solubility, refer here:
https://brainly.com/question/28170449
#SPJ1
standard light antarctic precipitation (slap) is a common reference material when making hydrogen isotope measurements. analysis of slap shows that it is 0.008917% 2h (mass 2.01410 amu) and the remainder is 1h (mass 1.00782 amu). what is the average mass of slap?
so we have to calculate the average mass of the SLAP
given,
percentage abundance of 2H= 0.008917%
mass of 2H= 2.01410 amu
mass of 1H= 1.00782 amu
now we calculate, the percentage abundance of 1H = 100% - 0.008917%
= 99.991%
the average mass of SLAP = percentage abundance of 1H x mass of 1H + percentage abundance of 2H x mass of 2H
= 99.991% x 1.00782 + 0.008917% x 2.01410
=(99.991x1.00782)/ 100 +( 0.008917)x2.01410/100
= 1.00773 + 0.000173
= 1.0079 amu
the average mass of SLAP is 1.0079 amu
learn more about amu here;
https://brainly.com/question/12309362
#SPJ4
nitric oxide (30.01 g/mol) can be produced from ammonia (17.04 g/mol) and oxygen (32.00 g/mol). identify the limiting reactant if 75 g nh3 and 150 g o2 react. assuming a 100% yield, determine the limiting reactant and calculate the mass of excess reactant left over.
Answer:
NH3 is the limiting reactant; 51 g of excess reactant left over.
Explanation:
First, create the chemical equation for this reaction and balance it:
4NH3 + 5O2 ---> 4NO + 6H2O
Then, find the limiting reactant, but in this case using NH3:
75 g NH3 * 1mol NH3/17.04 g NH3 * 5 mol O2/4 mol NH3 * 18.02 g 02/ 1 mol O2 = 99.14 g O2 needed
Since 99.14 g of O2 is needed to react with 75 g of NH3, this means O2 is the excess reactant, since we have 150 g of O2 which is more than needed. This means that NH3 is the limiting reactant.
To find the mass of excess reactant left over, subtract the mass of O2 needed (99.14 g) from the mass used in the reaction (150 g).
150 g - 99.14 g = 50.858 g
Round to the appropriate number of sig figs:
50.858 g --> 51 g
what happens to electrons to form an ionic bond?
Answer:
search-icon-header
Search for questions & chapters
search-icon-image
Class 10
>>General Knowledge
>>Basic Science
>>Basic Chemistry
>>What happens to electrons when an ionic
Question
Bookmark
What happens to electrons when an ionic bond forms?
Medium
Solution
verified
Verified by Toppr
It is the prior distribution of electrons that constitutes the electrostatic force of interaction..
Explanation:
Commonly, ions are formed by (i) the loss of electrons from metals... electron rich materials from the left of the Periodic Tables as we face the Table, whose valence electrons are furthest removed from the positively charged nuclear core... and (ii) the gain of electrons by non-metals to the right of the Periodic Table as we face it.
We could represent these processes by the reaction...
M→M
n+
+ne
−
oxidation
X+e
−
→X
−
reduction
We add the two redox processes together in such a way that the electrons are eliminated as virtual particles and we get a neutral salt... of a material and a non-metal that are held together by a strong electrostatic force of attraction...
M+nX→MX
n
And thus the electrons are formally redistributed to give positive and negative ions that combine to form NEUTRAL SALTS.