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Elena L [17]
3 years ago
8

When two intermediate chemical equations are combined, the same substance that appears in the same phase can be canceled out, pr

ovided that
Chemistry
1 answer:
Alla [95]3 years ago
4 0
When two intermediate chemical equations are combined, the same substance that appears in the same phase can be canceled out, provided that

<span>it is a reactant in one intermediate reaction and a product in the other reaction</span>

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Consider the reaction of magnesium metal with hydrochloric acid to produce magnesium chloride and hydrogen gas. If 3.29 mol of m
gregori [183]

Answer:

1.645 moles of excess reactant that is of magnesium metal are left over.

Explanation:

Moles of magnesium metal = 3.29 mol

Moles of HCl = 3.29 mol

Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)

According to recation, 2 moles of HCl reacts with 1 mol of magnesium metal, then 3.29 moles of HCl will react with :

\frac{1}{2}\times 3.29 mol=1.645 mol of magnesium metal

Moles of HCl left = 3.29mol - 3.29 mol = 0

Moles of magnesium metal left = 3.29 mol - 1.645 mol = 1.645 mol

1.645 moles of excess reactant that is of magnesium metal are left over.

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What is the mass of a 2.5 mole sample of MgO2
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