Water, H2O, is made via its formation reaction. How many moles of water form when (7.69x10^0) moles of oxygen gas react? (Answer in mol to 3 s.d. in proper scientific notation)

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Water, H2O, is made via its formation reaction. How many moles of water form when (7.69x10^0) moles of oxygen gas react? (Answer in mol to 3 s.d. in proper scientific notation)

yet again, i have no idea what im doing

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Answer 1 · 2017-04-13T02:04:20

The given amount of oxygen gas will produce $1.54 \times 10^{1}$ $1.54xx10^1$ mol water.

Explanation:

Start with a balanced equation. It will be used to determine mol ratios between the product and the reactant.

${2H}_{2} + O_{2}$ $"2H"_2 + "O"_2$ $\to$ $rarr$ ${2H}_{2} O$ $"2H"_2"O"$

Multiply the given mol oxygen gas by the mol ratio $\frac{2 {mol H}_{2} O}{1 {mol O}_{2}}$ $(2"mol H"_2"O")/(1"mol O"_2")$ from the balanced equation.

$7.69xx10^0color(red)cancel(color(black)("mol O"_2))xx=(2"mol H"_2"O")/(1color(red)cancel(color(black)("mol O"_2)))=1.54xx10^1color(white)(.)"mol H"_2"O"$

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Water, H2O, is made via its formation reaction. How many moles of water form when (7.69x10^0) moles of oxygen gas react? (Answer in mol to 3 s.d. in proper scientific notation)

yet again, i have no idea what im doing

1 Answer

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