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Ulleksa [173]
3 years ago
8

What is the mass number of 207Pb ? A: 289 B: 207 C: 125 D: 82

Chemistry
1 answer:
Sergio [31]3 years ago
3 0
207 is the mass number. 82 would be the atomic number
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A 4.24 kg marble slab has the volume of 1564 cm3 What is the density in g/cm3
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Answer:

The answer is

<h2>2.71 g/cm³</h2>

Explanation:

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

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<h3>2.71 g/cm³</h3>

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