1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
morpeh [17]
3 years ago
13

The chemical formula for the initial sample is mnso4·h2o and the chemical formula for the final sample is mnso4. use their molec

ular masses to calculate the theoretical percent mass of water in the initial sample. report your result to 3 significant figures,
e.g. 11.3%
Chemistry
1 answer:
sammy [17]3 years ago
4 0
The initial sample has a molecular formula of MnSO₄·H₂O. This molecule is a hydrate as it has a unit of water within its structure for every molecule of MnSO₄. This sample is being dehydrated to remove the water to give.

MnSO₄·H₂O → MnSO₄ + H₂O

MnSO₄·H₂O has a molecular mass of 169.02 g/mol. While MnSO₄ has a molecular mass of 151 g/mol. Water has a molecular mass of 18.02 g/mol. We now can use the ratio of the mass of water to the mass of the initial sample to determine the percentage of each component by mass.

% water by mass:

18.02/169.02 x 100% = 10.7% Water by mass.

% MnO₄ by mass:

151/169.02 x 100% = 89.3% MnSO₄ by mass.

Water makes up 10.7% of the initial mass of MnSO₄·H₂O.
You might be interested in
What is not equal to o.536 kilometers
mafiozo [28]
53.6 hectometer
536 meters
536,00 centimeters
3 0
3 years ago
What would happen if you added more than 5 mL of yeast solution to the H2O2?
Marat540 [252]

Answer: -

Hydrogen peroxide breaks down into water and oxygen.

2H₂O₂ → 2H₂O + O₂

The yeast present contains an enzyme called catalase which catalyses the reaction.

More the amount of the catalyst added, faster will be the decomposition of the hydrogen peroxide.

Thus if we added more than 5 mL of yeast solution to the 2H₂O₂, the breakdown would occur faster. Thus the bubbles and the accompanying fizz would be much more.

3 0
3 years ago
Copy and complete the concept map using the following:
lapo4ka [179]

Answer:

a) Alkali

b) Na

c) Cs

d) Inner Transition

e) actinides

f) Fe

g) Hg

Explanation:

  • K, Na and Cs are all Alkali Metals
  • Fe, Hg and Ag are all Transition Metals
  • actinides and lanthanides are known as the Inner Transition Metal

7 0
3 years ago
If 1.oo mol CS2 reacts with 1.00 mol O2 , identify the limiting reactant
miss Akunina [59]

moles of excess reactant remaining: 0.67 mol CS2

moles of each product formed: 0.33 mol CO2 and 0.67 mol SO2

your coefficients in the chemical equation reveal the molar ratio of the reactants that must be present to give a complete reaction of both reactants. in this case each mole of CS2 requires 3 moles of O2 to form the products given. if you start with equimolar amounts of both reactants then the O2 must be in insufficient supply to completely react with all of the CS2. if only 1 mole of O2 is present, it will be consumed by one third that amount of CS2. all O2 will react. 0.67 mole of CS2 will remain. the CO2 comes from the carbon in CS2, so 0.33 mole of CO2 will be produced. since 2 moles of SO2 are produced for each mole of CO2 produced, then the amount of SO2 produced will be 0.67 mol.



4 0
3 years ago
a certain quantity of gas occupies 20l at 50°c and pressure of 2 atm.at what pressure will the volume of the gas will be occupy
Ilia_Sergeevich [38]

Answer:

20atm

Explanation:

according to boyles law P1V1= P2V2

3 0
3 years ago
Other questions:
  • Which part of a nuclear power plant spins to produce mechanical energy?
    10·1 answer
  • As you climb through the troposphere, the temperature:
    10·1 answer
  • Bombarding uranium-235 with _____ creates energy through fission
    7·2 answers
  • Please help I will mark Brainly!
    12·1 answer
  • Humans face a problem because once petroleum reserves begin to run out, there won't be enough fuel to power all the automobiles
    5·2 answers
  • Describe the process of sublimation in terms of heat
    14·1 answer
  • Help me with this questions please
    8·1 answer
  • A solution mass of 1 kg is 10 times greater than 100 g, thus one kilogram (1 kg) of a 2.5% KI solution would contain of KI.
    12·1 answer
  • What type of cow are you? I really need to know because I just do ok
    8·1 answer
  • 15 POINT..!!! NEED ANSWER ASAP..!!! consider the original wave. which of the four example represents the same sound just much lo
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!