Question

Choose the correct answer
i)In a compound such as water, the ratio of the mass of hydrogen to the

mass of oxygen is always 8: 1

ii) If 9 g of water is decomposed, 1 g of hydrogen and 8 g of oxygen are

always obtained.

iii) In ammonia, nitrogen and hydrogen are always present in the ratio

by mass.

iv) Many compounds are composed of two or more elements and each such

compound has the same elements in the same proportions

A)1 and 3
B)1,2 and 3
C)2 and 3
D)All of these
​

Answer 1

Answer:

 2 and 4 In a compound such as water, the ratio of the mass of hydrogen to the mass of oxygen is always :1 8.

Explanation:

 In water (H2O), hydrogen and oxygen are always present in the ratio of 1 : 8 by mass whatever the method of source from which water is obtained