2 years ago

100 Points.

1 answer:

6 0

I think it’s C but I’m not sure

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Inessa05 [86]

Pretty sure the answer is D.

8 0

2 years ago

madreJ [45]

Answer:

37.8g/ 10.81g/mol = 3.4968...moles

3 0

2 years ago

kow [346]

Plastic doesn’t connect to metals

6 0

2 years ago

lutik1710 [3]

The answer should be A.
Hope this helps :-)

4 0

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