7. Which of the following has the smallest number of molecules?
(A) 0.1 mole of CO, gas
(B) 11.2 litres of CO, gas
(C) 22g of CO, gas
(D) 22.4 x 10 ml of CO2 gas
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Answer:
A) 0.1 mole of co,gas
Explanation:
0.1moleCO
2
=6.023×10
22
molecules
11.2litresofCO
2
=0.5×6.023×10
23
molecules=30.11×6.023×10
22
22gCO
2
=0.5×6.023×10
23
molecules=30.11×6.023×10
22
22.4×103mlCO
2
=
22.4
22.4×103×0.001
moles=0.103molecules=6.204×10
22
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