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Hatshy [7]
3 years ago
14

How many moles of water can be obtained from the reaction of 4 moles of O2?

Chemistry
1 answer:
Yuliya22 [10]3 years ago
6 0

Answer: 8moles

Explanation:

The reaction below shows the formation of 2 moles of water from 2 moles of hydrogen and 1 mole of oxygen respectively.

2H2(g) + O2 (g) --> 2H2O(l)

So, if 1 mole of O2 produce 2 mole of H2O

4 moles of O2 will produce Z mole of H2O

To get the value of Z, cross multiply

1 x Z = 4 x 2

Z = 8

So, the equation will be 8H2(g) + 4O2 (g) --> 8H2O(l)

Thus, 4 moles of O2 will produce 8moles of H2O .

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If there are 40 mol of NBr3 and 48 mol of NaOH, what is the excess reactant?
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Answer:

The correct answer is option B.

Explanation:

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According to reaction, 3 moles of NaOH reacts with 2 moles NBr_3

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As we can see that 48 moles of sodium will completey react with 32 moles of nitrogen tribromide.

Moles left after reaction = 40 mol - 32 mol = 8 mol

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