Answer:
B.
Explanation:
This is physical change as the popcorn has expanded in size.
Calcium chloride is the solute because it was dissolved in water.
Therefore water is the solvent.

The word equation for above chemical equation is :
Sulphur + Oxygen
Sulphur dioxide
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Answer:
There are 0.0267 moles of oxygen in 0.658 grams of magnesium nitrate.
Explanation:
Mass of magnesium nitrate = m = 0.658 g
Molar mass of magnesium nitrate = M = 148 g/mol
Moles of magnesium nitrate = n

1 mole of magnesium nitrate has 6 moles of oxygen atoms. Then 0.004446 moles magnesium nitrate will have :

There are 0.0267 moles of oxygen in 0.658 grams of magnesium nitrate.