Question

which contains more molecules, 4kg of mathane or 1 kg of oxygen

Answer 1

$\textbf{\huge{\underline{ Hello Mate! }}}$

Since we know that,

No. of molecules =( W in g / W in g/mol ) × Avagrado no.

Point to note is that methane is a molecule, which of formed of $\textsf{\red{two element C and H.}}$

Methane = CH4

Since, atomic mass of carbon is 12 g/mol and H is 1 g/mol.

Methane = ( 12 × 1 ) u + ( 1 × 4 ) u

= 16 g/mol

Now, atomic mass of Oxygen is 16 g/mol.

So molecular mass of Oxygen is 16 × 2 = 32 g/mol

Converting 4 kg into g = 4000g

1 kg = 1000g

No. of molecules

$= \frac{4000}{16} \times 6.022 \times {10}^{23} \\ = \frac{1000}{4} \times 6.022 \times {10}^{23} \\ = 1.5055 \times 1000 \times {10}^{23} \\ = 1.506 \times {10}^{26}$

No. of molecules

$= \frac{1000}{32} \times 6.022 \times {10}^{23} \\ = 0.1882 \times 1000 \times {10}^{23} \\ = 1.882 \times {10}^{25}$

Hence, 4 kg of methane will contain more molecules than 1 kg of oxygen.

$\textbf{ Have great future ahead! }$

Answer 2

Answer:

No. of molecules = \frac{1000}{32} \times 6.022 \times {10. Hence, 4 kg of methane will contain more molecules than 1 kg of oxygen.

Top answer · 2 votes

$\textbf{\huge{\underline{ Hello Mate! }}}$Since we know that,No. of