2 years ago

The mass number of an atom is found by adding

Chemistry

1 answer:

pentagon [3]2 years ago

8 0

Adding protons and neutrons

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Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

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We have

$density = \frac{90}{120} = \frac{9}{12} = \frac{3}{4} \\$

We have the final answer as

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