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Problem 79

Metal hydrides react with water to form hydrogen …

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University of New Mexico

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Problem 78

Many metals react with oxygen gas to form the metal oxide. For example, calcium reacts as follows:
$$
2 \mathrm{Ca}(s)+\mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{CaO}(s)
$$
You wish to calculate the mass (g) of calcium oxide that can be prepared from 4.20 $\mathrm{g}$ of $\mathrm{Ca}$ and 2.80 $\mathrm{g}$ of $\mathrm{O}_{2} .$
(a) What amount (mol) of $\mathrm{CaO}$ can be produced from the given mass of Ca?
(b) What amount (mol) of CaO can be produced from the given mass of $\mathrm{O}_{2} ?$
(c) Which is the limiting reactant?
(d) How many grams of CaO can be produced?

Answer
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Chapter 3
Stoichiometry of Formulas and Equations
CHEMISTRY: The Molecular Nature of Matter and Change 2016

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