3 years ago

Which of the following statements regarding matter is false?

Chemistry

1 answer:

agasfer [191]3 years ago

3 0

Answer:

All matter exists in the form of compounds.

Explanation:

Matter is anything that has weight and occupies space. For anything to have weight, it must have mass. Weight is a product of mass and gravity.

The atom is the simplest form of matter. When atoms combines as elements, they form molecules and compounds.

Matter can exist as atom, element, compounds and mixtures.

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According to the Graham's law, the rate of effusion of gas is inversely proportional to the square root of the molar mass of gas.

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or,

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$R_1$ = rate of effusion of fluorine gas

$R_2$ = rate of effusion of methane gas

$n_1$ = moles of fluorine gas = $5.13\times 10^{-3}mol$

$n_2$ = moles of methane gas = ?

$t_1=t_2$ = time = 12.3 min (as per question)

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$M_2$ = molar mass of methane gas = 16 g/mole

Now put all the given values in the above formula 1, we get:

$[\frac{(\frac{5.13\times 10^{-3}mol}{12.3min})}{(\frac{n_2}{12.3min})}]=\sqrt{\frac{16g/mole}{38g/mole}}$

$n_2=7.90\times 10^{-3}mol$

Therefore, the moles of methane gas could be, $7.90\times 10^{-3}mol$

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