please help me out with these problems ! asap! i dont know how to solve it
Chapter 9 Worksheet
Stoichiometry
1. Consider the following equation:
As2O3 + 2 Cl2 + 5 H2O
2 H3AsO4 + 4 HCl
a. How many grams of H AsO can be produced from 34.5 g of H O?
4
3
2
2. Consider the following equation:
2 Al + 3 Pb(NO3)2
2 Al(NO3)3 + 3 Pb
a. How many moles of Pb(NO ) are needed to produce 0.0124 mol of Al(NO ) ?
3
b.
2
3
How many moles of Pb(NO ) are needed to produce 15.4 g of Pb?
3
2
c. How many grams of A1(NO ) can be produce from 1.09 mol of Pb(NO )
3
d.
3
3
2
How many grams.of AI are needed to react with 142 g of Pb(NO ) ?
3
2
e. How many Pb atoms can be produced from 34.7 g of Pb(NO ) ?
2
3
f. How many grams of Pb(NO ) are needed to react with 1.23 x 1021 Al atoms?
3
2
3. Consider the following equation:
N +3H
2 NH
2
2
3
a. How many NH molecules can be produced from 10.3 g of N ?
2
3
b. How many grams of NH can be produced from 4.31 xl0
3
22
H2 molecules?
3
c. How many N molecules are required to produce 6.99 x 10
2
4. Consider the following equation:
Fe2O3 + 3 CO
24
NH molecules?
3
2 Fe + 3 CO2
a. If 100.0 g of CO reacts, how many grams of Fe can form?
b.
If 50.0 g of Fe are actually obtained when the reaction is run in the lab, what is the
percent yield?