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leonid [27]
3 years ago
7

What is the mass, in g, of 27.2 mol of N? Be sure to answer all parts. Enter your answer in scientific notation. x 10 (select) A

gN
Chemistry
1 answer:
svp [43]3 years ago
4 0

Explanation:

It is known that number of moles of a substance equal to mass divided by its molar mass.

Mathematically,         No. of moles = \frac{mass}{\text{molar mass}}

It is given that no. of oles present are 27.2 mol and molar mass of N is 14 g/mol.

Therefore, calculate mass of N as follows.

                 No. of moles = \frac{mass}{\text{molar mass}}

                       27.2 mol = \frac{mass}{14 g/mol}

                      mass = 380.8 g

Thus, we can conclude that mass of N is 380.8 g.

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Explanation:

Hello,

In this case, given the molecular formulas:

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We can relate the subscripts with the oxidation states by knowing that they are crossed when the compound is formed, for that reason, we notice that oxygen oxidation state should be -2 for both cases and the oxidation state of X in the first formula must be +2 since both X and O has one as their subscript as they were simplified:

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Moreover, for the second case the oxidation state of X should be +3 in order to obtain 3 as the subscript of oxygen:

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Thus, answer is b)+2 and +3

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