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How many moles of sodium oxide will be produced when 10 moles of sodium react with oxygen?

Answer 1

Owen Ambrose

#"2.5 mol O"_2#

First, write a balanced equation

#4"Na" + "O"_2 -> 2"Na"_2"O"#

Then multiply the mols of #"Na"# given in the question by the mol ratio. In this case, the mole ratio is

#("1 mol O"_2) / ("4 mol Na")#

Remember what you want in the answer should be in the numerator and what is given in the question should be in the denominator so it cancels out.

#10 cancel("mol Na") * ("1 mol O"_2) / (4 cancel("mol Na")) = "2.5 mol O"_2#

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Answer 2

Kai Bowman

5 moles of sodium oxide.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.