Question

The ratio between the number of molecules in equal masses of nitrogen and oxygen is
1) 7:8
2) 1:9
3) 9:1
4) 8:7​

Answer 1

Answer:

8:7

Explanation:

=> the molar mass of nitrogen -> 14 u

nd molar mass of oxygen -> 16 u

now let 2u same mass of both

then,

no of moles of oxygen => 16/2 => 8 mole

no of moles of nitrogen=> 14/2 => 7 mole

now,

no of molecules of oxygen

=> 8×6.02×10^23

no of molecules of nitrogen

=> 7×6.02×10^23

now ratio between oxygen nd nitrogen

=> 8×6.02×10^23/7×6.02×10^23

=> 8/7 => 8:7

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Answer 2

Answer:

7:8 is the ratio of molecules in equal masses of nitrogen and oxygen.