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1) One of the major uses of sulfuric acid is the production of phosphoric acid and calcium sulfate. The reaction is:

Ca3(PO4)2(s) + 3H2SO4(aq) 3CaSO4(s) + 2H3PO4(aq)

What mass of concentrated sulfuric acid (98.0 % H2SO4 by mass) must be used to react completely with 100.0 g of Ca3(PO4)2?

grams

2) Ammonia is produced from the reaction of nitrogen and hydrogen according to the following balanced equation:

N2(g) + 3H2(g) 2NH3(g)

a) What is the maximum mass of ammonia that can be produced from a mixture of 1000. g of N2 and 500.0 g of H2?

grams

b) What mass of which starting material would remain unreacted?

UNREACTED MASS: grams

UNREACTED ELEMENT (type hydrogen or nitrogen):