2 years ago

The two electrons in a helium atom occupy

Chemistry

1 answer:

IRINA_888 [86]2 years ago

4 0

Answer:

the answer is A

Explanation:

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aleksley [76]

Answer:

Gold

Explanation:

We are given that

Mass of sample ,m=385 g

Volume ,V=20mL

We have to find the coin is gold or yellow brass.

We know that

Density= $\frac{Mass}{volume}$

Using the formula

$Density=\frac{385}{20}g/mL$

$Density=19.25g/mL$

$Density\approx 19.3g/mL$

Density of coin=19.3g/mL

Density of gold=19.3g/mL

Hence, the coin is gold.

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kifflom [539]

Answer:

Precipitation Reactions

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What is the gram-formula mass of Ca3(PO4)2

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310.17 grams so there

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In response to boyle’s law, the pressure of a gas increases as the volume decreases because

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3 years ago

What safety precautions are needed when running a brine electrolysis plant

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