Question

Plz help me in this question...

Which contains more molecules?
4 grams of methane (CH4)
OR
4 grams of Oxygen (O2)
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but how...?
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I will mark u brainleist answer... plz help me... in this question.... there is 5p pts 4 u.... I will follow u...

Answer 1

The greater the number of molecules, the more molecules of a substance you have.

Number of moles=mass/molecular mass

So for methane0.004/(12+(1*4)

= 2.5×10^-4 moles (mass is in kilograms)

And for 02:0.004/(2*16)= 1.25×10^-4

Which means that ch4(Methane) has more molecules.

Hope this helps.......

Thank you.

Answer 2

Molecular mass of sulphuric acid (H2SO4) = 1 x 2 + 32 x 1 + ... Mass of methane = 3.5 × 16 = 56 g ... 1 mole of oxygen is 32 g = 32 x 10-3 kg.