Chemistry, 11.09.2021 14:00 addisonrausch

1Calcium carbonate breaks down on heating to produce calcium oxide and carbon dioxide gas. CaCO3 → CaO + CO2
A student heats 15 g of calcium carbonate strongly in a crucible.
Relative atomic masses (Ar): Ca = 40, C = 12, O = 16.
aCalculate the number of moles in 15 g of calcium carbonate. 0.15(2 marks)
bUse your answer to part a to determine the number of moles of calcium oxide that will be produced.(1 mark)
cCalculate the mass of calcium oxide produced by this reaction.(2 marks)

2A student is preparing a sample of sodium nitrate, NaNO3.
She mixes 17 g of sodium oxide with an excess of nitric acid. The equation for the reaction is:
Na2O + 2HNO3 → 2NaNO3 + H2O
Relative atomic masses (Ar): Na = 23, O = 16, N = 14, H = 1.
aCalculate the number of moles in 17 g of sodium oxide.(2 marks)
bCalculate the maximum mass of sodium nitrate that can be produced in this reaction.(3 marks)

3Aluminium and iron oxide (Fe2O3) react together to produce aluminium oxide (Al2O3). The equation for the reaction is:
2Al + Fe2O3 → Al2O3 + 2Fe
Calculate the mass of iron that is produced by reacting 20 g of iron oxide with an excess of aluminium.
Relative atomic masses (Ar): Al = 27, O = 16, Fe = 56.(4 marks)

Answers: 2

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 03:10

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Answers: 1

Answer

Chemistry, 22.06.2019 06:30

This drawing shows a human body system. what is the primary function of this body system?

Answers: 3

Answer

Chemistry, 22.06.2019 08:30

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Answers: 1

Answer

Chemistry, 22.06.2019 13:10

Select the correct answer a modure consists of glucose and water. what is the percent composition of glucose in the mixture if it contains 1.3 moles of glucose (cho total mass of the mature is 276 grams? ) and the a 1775

Answers: 1

Answer

You know the right answer?

1Calcium carbonate breaks down on heating to produce calcium oxide and carbon dioxide gas. CaCO3 →...

Questions