Answer:

The answer is

1.61 g/cm³

Explanation:

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

density = \frac{mass}{volume}

From the question

mass = 12.9 g

volume = 8 cm³

The density of the block is

density = \frac{12.9}{8} \\ = 1.6125

We have the final answer as

1.61 g/cm³

Step-by-step explanation:

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