### Calculate the maximum numbers of moles and grams …

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Carleton College

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Problem 79

Metal hydrides react with water to form hydrogen gas and the metal hydroxide. For example,
$$\mathrm{SrH}_{2}(s)+2 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{Sr}(\mathrm{OH})_{2}(s)+2 \mathrm{H}_{2}(g)$$
You wish to calculate the mass (g) of hydrogen gas that can be prepared from 5.70 $\mathrm{g}$ of $\mathrm{SrH}_{2}$ and 4.75 $\mathrm{g}$ of $\mathrm{H}_{2} \mathrm{O}$ .
(a) What amount (mol) of $\mathrm{H}_{2}$ can be produced from the given
mass of $\mathrm{SrH}_{2} ?$
(b) What amount (mol) of $\mathrm{H}_{2}$ can be produced from the given
mass of $\mathrm{H}_{2} \mathrm{O}$ ?
(c) Which is the limiting reactant?
(d) How many grams of $\mathrm{H}_{2}$ can be produced?

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

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