Question

8. A 2g of sample containing sodium carbonate and
sodium bicarbonate was heated to a temperature
which all the sodium bicarbonate in the sample wa
converted to Na2CO3, CO, and H20. The final weig
of the sample after heating becomes 1.752 g. The
percentage of Na2CO3 in the sample is
(a) 76%
(b) 66%
(c) 72%
(d) 54%
9. Amount of oxygen required for combustion of 1 kg
a mixture of butane and isobutane is
(a) 1.8 kg
(b) 2.7 kg
(C) 4.5 kg
(d) 3.58 kg​

Answer 1

Answer:

c is your answer mate..

A is your answer mate..

D is your answer mate..