4ai + 3022al2o3
3. 27 grams of aluminum reacts with 32 grams of oxygen. assuming all of the reactants are
used up, how much aluminum oxide will be produced?
a 58
6 598
c 32 g
d 40 g
2na + cl2 → 2nach
4. 23 grams of sodium reacts with chlorine gas. assuming all of the reactants are used up, how
much chlorine was used if 71 grams of sodium chloride was produced?
a 104 g
b 948c 488
d. 123 g
27.
12h2 + o2 + 2h2o
5. which of the following statements accurately describes the reaction shown above?
a the mass of the hydrogen gas plus the oxygen gas is less than the mass of the water.
b the hiass of the hydrogen gas minus the oxygen gas is equal to the mass of the water.
c the mass of the hydrogen gas plus the oxygen gas is equal to the mass of the water.
d the mass of the hydrogen gas is equal to the oxygen gas plus the mass of the water.
hydrogen
+
water
oxygen
sg
64 g
6. s grams of hydrogen reacts with 64 grams of oxygen. assuming all of the reactants are used
up, how much water will be produced?
b 568
a 728
c 64 g
d 144 g
s + 802 8so2
7. if 64 g of sulfur react with 4g of oxygen gas, what will be the mass of the sulfur dioxide
produced?
a 60 g
b 64 g
c 68 g
d 48 g
2cu + o2 + 2cuo
8. when 63.5 g of copper reacts with 16.0 g of oxygen gas to form copper (11) oxide, no copper
or oxygen is left over. how much copper (11) oxide is produced?
a 3.978
b 47.5 g
c 79.5 g
d 143 g
mercury(ii) oxide
oxygen + mercury
30.0 g
2.1 g
9. according to the law of conservation of mass, how much mercury was present in the mercury
b 32.19 c 27.990 63g
'n + 2hcl → zncl2 + hz
3.4g 72.9 g
? g 2.0 g
ride une produced in the equation above?
c 74.9g
d 138.6 g
о. но