Question

how many atoms are present in 4g methane gas?​

Answer 1

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☞Methane - It is a very known chemical compound that formula is CH4. According to its chemical formula, it has one carbon atom and four hydrogen atoms. And as we know that each atom of carbon contains 6 electrons and each atom of hydrogen contains 4.

Hope it's helpful↑(◍•ᴗ•◍)❤࿐

Answer 2

Answer:

There are total 7.5275 × 10^23 numbers of atoms in 4 g CH4 gas .

Explanation:

Provided that:

The weight of given methane gas (w) = 4g

We know that;

Molar mass or Molecular mass of CH4 is (m) = 16.04 g/mol

Let number of moles = n;

$number \: of \: moles(n) = \frac{weight \: of \: substance(w)}{molar \: mass(m)} \\ or \: n = \frac{4}{16} \: moles \\ = 0.25 \: moles$

We know the number of particles(atoms, molecules) present in 1 mole gas is = Avogrado Number (NA)

Avogrado Number (NA) = 6.022×10^23

Hence we can calculate the number of gas molecules in 0.25 mole CH4 gas;

Let number of gas molecules = N :

$N = n \times Avogrado Number (NA) \\ N = 0.25 \times 6.022 \times {10}^{23} \\ = 1.5055 \times {10}^{23}$

Hence there are 1.5055 × 10^23 numbers of gas molecules in 0.25 mole CH4 gas.

And the CH4 gas molecules are made with 1 Carbon (C) and 4 Hydrogen (H) atoms; so there are total 5 atoms in CH4 gas molecule.

Hence total number of atoms in 0.25 mole CH4 gas:

$N \prime = N \times 5 \\ N \prime = 1.5055 \times {10}^{23} \times 5 \\ = 7.5275 \times {10}^{23}$

Hence there are total 7.5275 × 10^23 numbers of atoms in 4 g CH4 gas .