Calcium carbonate (CaCO3 ) is 34.5 Ca by mass. In a 418 g sample ...

[Capo]

Calcium carbonate (CaCO3 ) is 34.5 Ca by mass. In a 418 g sample of CaCO3, how many grams of calcium are present?
 
  A) 144 g
  B) 40.08 g
  C) 235.1 g
  D) 83.6 g

Question 2

Vitamins such as vitamin B and vitamin C are often lost by boiling vegetables. Why?
 
  A) They are water soluble and are poured down the drain with the water.
  B) The heat of the boiling water destroys the vitamin.
  C) The heat of the boiling water causes the vitamin to evaporate.
  D) They are fat-soluble compounds and vegetables do not have much fat.
  E) none of the above

[dawsa925]

Answer to Question 1

A

Answer to Question 2

A