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Goryan [66]
3 years ago
8

If an isotope has an atomic number of 8 and a mass number of 18 how many neutrons

Chemistry
1 answer:
Artemon [7]3 years ago
6 0
It will be Oxygen . And total 8 protons, 8 electrons and 9 neutrons are present in it.
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What is the molecular formula for C5H7 if its molar mass is 536 g/mol?
hodyreva [135]

Answer:

(C5H7)8

Explanation:

It's empirical formula is given as; C5H7

Molar mass of carbon(C) = 12 g/mol

Molar mass of hydrogen(H) = 1 g/mol

We are told that it's molar mass is 536 g/mol.

To find the molecular formula;

Molecular formula = n × empirical formula

Thus;

n = 536/((12 × 5) + (1 × 7))

n = 8

Thus;

Molecular formula = (C5H7)8

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