- Ammonium fluoride reacts with calcium nitrate to produce
calcium fluoride, dinitrogen monoxide, and water. If 22.8 g of ammonium
fluoride react with 38.2 g of calcium nitrate, how much dinitrogen monoxide
could be formed?
- Copper reacts with nitric acid to form copper (II)
nitrate, nitrogen dioxide, and water. If 25.0 grams of copper react
with an excess of nitric acid to form 7.24 grams of nitrogen dioxide,
what is the percent yield of the reaction?
- Aluminum sulfide reacts with water in a double displacement
reaction. If 56.0 g of aluminum sulfide reacts with 48.2 g of water,
which is the excess reactant and how much of this reactant would be
leftover after the reaction is complete?
- Calcium combines with nitrogen to form calcium nitride.
If 33.8 g of calcium reacts with 20.4 g of nitrogen gas, which reactant
is the limiting reactant? How much calcium nitride is formed? How
much
of the excess reactant is leftover?
- Dinitrogen tetroxide reacts with
dinitrogen tetrahydride to form nitrogen gas and water. How much
of each reactant is required
to form 100.0 pounds of nitrogen gas?
- Silver tarnishes in the presence of dihydrogen sulfide
(which smells like rotten eggs) and oxygen. The two products of the
reaction are silver sulfide and water. How many grams of silver sulfide
can be formed from a mixture of 1.1 grams of silver, 0.14 grams of
hydrogen sulfide, and 0.080 grams of oxygen?
- An astronaut excretes about 2500 grams of water a
day. Lithium oxide is used in spaceships to absorb this water; the
single product of the reaction is lithium hydroxide. How many kilograms
of lithium oxide must be carried for a 30-day space voyage for three
astronauts?
- Oxygen masks for producing oxygen in emergency situations
contain potassium superoxide (KO2), which reacts with
water and carbon dioxide to form potassium hydrogen carbonate and
oxygen gas. If a person wearing such a mask exhales 0.85 grams of
carbon dioxide every minute, how many moles of potassium superoxide
are consumed in 10.0 minutes? How many grams of oxygen are produced in 1.0 hours?
- Iron reacts with copper(II) sulfate to form copper metal and iron(II)
sulfate. If a solution containing 400. grams of copper sulfate reacts
with an excess amount of iron and 151 grams of iron (II) sulfate are
obtained, what is the percent yield of the experiment?
- When 12.82 grams of a mixture of potassium chlorate and sodium chloride
are heated, the potassium chlorate decomposes to form potassium
chloride and oxygen gas. (This is an easy way to produce oxygen gas
in the laboratory.) The sodium chloride does not undergo any reaction.
After heating, the mass of residue (potassium chloride and sodium chloride)
is 9.45 grams. Assuming that all of the mass lost represents a loss
of oxygen gas, and that all of the potassium chlorate decomposes, calculate
the percent of potassium chlorate in the mixture.
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