$1mol\ \ \ \ \rightarrow \ \ \ 6,02*10^{23}\\
x \ \ \ \ \ \ \ \ \ \rightarrow \ \ \ 3,98*10^{23}\\\\
x=\frac{3,98*10^{23}*1mol}{6,02*10^{23}}\approx0,66mol$

8 0

2 years ago

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Define mass number of an atom.

Georgia [21]

The mass number of an atom is basically the total number of protons and neutrons.

6 0

2 years ago

Find the relative molecular mass of hydrated iron (II) sulphate FeSO4.7H2O

Pepsi [2]

Answer:

the relative molecular mass of hydrated iron (II) sulfate FeSO4.7H2O is 278.02

Explanation:

5 0

2 years ago

A student tests the pitch of different-sized rubber bands by stretching them around a box and then plucking them. What pitch doe

Nostrana [21]

Answer:

your answer will be C

Explanation:

remember low souunds carry sound waves farther than high pithed sounds.

4 0

3 years ago