80g of calcium reacts with water to form 114g of calcium hydroxide and 2g of hydrogen.
2 Ca + 2 H0+2CaOH + H,
What mass of water was used in this reaction?

31g

Explanation:

80g(Ca)+m(H2O)=114g(CaOH)+2g(H2)

the total mass of the prodicts doesn't change throughout the process

80g+m(H20)=116g

m(H20)=31g

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

6.4 cm (max) - 25 cm (min)