need help w/these chemistry converting probs.....?

Question

11) C2H2 is made from adding water to CaC2.

CaC2 (s) + 2H2O (l) >>>>C2H2 (g) + Ca (OH)2 (aq)

How many Grams of acetylene are produced by adding water to 5.00 g CaC2?

12) using the same equation, how many moles of CaC2 are needed to react completely w/ 49.0 g H2O?

Answer 1

first, acetylene is commonly known as ethyne C2H2

here's how to solve this

(1) calculate moles of CaC2 added = mass/molecular weight
(2) calculate moles of C2H2 produced from number of moles of CaC2 calculated from (1) hint use the balanced equation above
(3) convert moles of C2H2 produced to grams of C2H2 produced via moles = mass/molecular weight


second part

(4) calculate moles of water in 49 grams of water. I've given you the equation twice
(5) calculate the number of moles of CaC2 required to react with the number of moles of H2O from (4) same hint use the balanced equation.

last hint the equation says 1 mole of CaC2 + 2 moles H2O gives 1 mole C2H2


you do the rest