Question

Chromium is manufactured by heating a mixture of chromium(III) oxide
with aluminium powder.

Cr2O3(s) + 2Al(s) → 2Cr(s) + Al2O3(s)

a) Calculate the mass of aluminium needed to react with 50 g of Cr2O3.

b) Calculate the mass of chromium produced from 50g of Cr2O3.

c) Calculate the mass of chromium produced from 5 kg of Cr2O3.

d) Calculate the mass of chromium produced from 5 tonnes of Cr2O3.

(1 tonne is 1 000 000 g)
(A,: Cr=52, 0 = 16, Al = 27)
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Answer 1

Answer:

Cr2O3(s) + 2Al(s) → 2Cr(s) + Al2O3(s)

a) Calculate the mass of aluminium needed to react with 50 g of Cr2O3.

b) Calculate the mass of chromium produced from 50g of Cr2O3.

c) Calculate the mass of chromium produced from 5 kg of Cr2O3.

d) Calculate the mass of chromium produced from 5 tonnes of Cr2O3.

(1 tonne is 1 000 000 g)

(A,: Cr=52, 0 = 16, Al = 27)

Answer 2

Answer:

.

Explanation:

.