3 years ago

I need help with this answer

1 answer:

frez [133]3 years ago

7 0

A
not every expirement has control

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Anastasy [175]

Explanation:

the coefficient of hydrogen is 3

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3 years ago

Reika [66]

I think it’s chemical reactivity

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3 years ago

sveta [45]

Answer:

Explanation:

Protons have a positive net charge,

Neutrons being neutral don't have a net charge.

Each proton is one extra net charge if you have 16 of them and the neutrons don't affect your net charge you will have 16.

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3 years ago

Vedmedyk [2.9K]

You have to imagine it

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2 years ago

natulia [17]

Answer:

There are 0.00523 moles of oxygen in 0.150 grams of calcium sulfate crystal.

Explanation:

Mass of calcium sulfate crystal = m = 0.150 g

Molar mass of calcium sulfate crystal = M = 172 g/mol

Moles of magnesium nitrate = n

$n=\frac{m}{M}$

$n=\frac{0.150 g}{172 g/mol}=0.0008721 mol$

1 mole of calcium sulfate crystal has 6 moles of oxygen atoms. Then 0.004446 moles calcium sulfate crystal will have :

$6\times 0.0008721 mol=0.0052326mol\approx 0.00523 mol$

There are 0.00523 moles of oxygen in 0.150 grams of calcium sulfate crystal.

8 0

3 years ago