Katherine B. answered • 04/13/21

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It looks like the equation is already balanced for you, so the first step will be to convert 144.1 grams of HNO_{3} to moles. To do this find the molar mass, and use to to do your conversion.

Using the numbers provided for mass, this is the equation:

1(1.0) + 1(14) + 3(16) = 1 + 14 + 48 = 63 g/mol

144.1 ~~g HNO~~_{3} x __ 1 mol HNO___{3}__ __ = 2.287 mol HNO_{3}

63 ~~g HNO~~_{3}

Now that you know how many moles of HNO_{3 } you're starting with, use the ratio of moles in the equation to find the moles of H_{2}O produced. The coefficient of HNO_{3} is 8, and H_{2}O is 4

2.287 ~~mol HNO~~_{3} x __ 4 mol H___{2}__O __ = 1.144 mol H_{2}O

8 ~~mol HNO~~_{3}

Since the question asks that the answer be rounded to the nearest tenth, 1.1 moles H_{2}O is the answer