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andreyandreev [35.5K]
3 years ago
5

HELP ASAP! In what phase do molecules flow but still remain close together? A. Solid B. Liquid C. Gas D. None

Chemistry
1 answer:
egoroff_w [7]3 years ago
8 0
The answer is B ...
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To calculate the moles :

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\text{Moles of} H_2=\frac{10.0g}{2g/mol}=5.00moles

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The balanced chemical reaction is :

2H_2+O_2\rightarrow 2H_2O

According to stoichiometry :

1 moles of O_2 require = 2 moles of H_2

Thus 0.625 moles of O_2 will require=\frac{2}{1}\times 0.625=1.25moles of H_2

Thus O_2 is the limiting reagent as it limits the formation of product and H_2 is the excess reagent as it is present more than the required amount.

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