The atomic mass of an atom of carbon is 12 amu, and the atomic mass of an atom of oxygen is 16 amu. to produce co2, 16 g of oxygen combine with 12 g of carbon. to produce co2, 32 g of oxygen combine with 12 g of carbon. the ratio of the mass of oxygen in co2 to the mass of oxygen in co is a 8: 3. b 1: 1. c 2: 1. d 1: 2.

Answer : The correct option is, (C) 2 : 1

Explanation : Given,

Atomic mass of carbon = 12 amu

Atomic mass of oxygen = 16 amu

To produce , 16 g of oxygen combine with 12 g of carbon. That means,

Mass of oxygen in CO = 16 g

Mass of carbon in CO = 12 g

To produce , 32 g of oxygen combine with 12 g of carbon. That means,

Mass of oxygen in = 32 g

Mass of carbon in = 12 g

Now we have to determine the ratio of the mass of oxygen in to the mass of oxygen in .

Therefore, the ratio of the mass of oxygen in to the mass of oxygen in is, 2 : 1

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.