subject
Chemistry, 23.02.2021 21:10 m3xl0v3

Calcium 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.

4 / 4

a Calculate the number of moles in 15 g of calcium carbonate. (2 marks)

b Use your answer to part a to determine the number of moles of calcium oxide that will be produced. (1 mark)

c Calculate the mass of calcium oxide produced by this reaction. (2 marks)

4 A 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.

a Calculate the number of moles in 17 g of sodium oxide. (2 marks)

b Calculate the maximum mass of sodium nitrate that can be produced in this reaction. (3 marks)

5 Aluminium 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)

ansver
Answers: 1

Other questions on the subject: Chemistry

image
Chemistry, 22.06.2019 13:00, nauticatyson9
Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?
Answers: 1
image
Chemistry, 22.06.2019 13:50, aesthetickait
How does the motion of particles in a gas change as the gas cools
Answers: 2
image
Chemistry, 22.06.2019 13:50, amandamac7339
Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.
Answers: 1
image
Chemistry, 22.06.2019 15:20, Callmetay24
Element before carbon on the periodic table
Answers: 1
You know the right answer?
Calcium carbonate breaks down on heating to produce calcium oxide and carbon dioxide gas. CaCO3 ® C...

Questions in other subjects:

Konu
History, 21.10.2020 19:01