Question

Calculate the number of moles in 52 grams of helium

Answer 1

The molar mass that is the mass of 6.022 X 1023 atoms of helium is 4g. Hence 1 mole of He = 4 g of He = 6.022 X 1023atoms of He.
1 g of He = (6.022 X 1023) / 4 atoms of He.
52 g of He = (6.022 X 1023X 52 ) / 4 atoms of He.

Answer 2

Answer:

52 grams of helium gas is equal to 13 moles of helium .

Explanation:

• Mole is a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, ions, etc.
• 1 mole of any substance is equal to 6.022 x 10²³ of that substance.
• 6.022 x 10²³ is called the Avogadro's number.
• Molar mass of 4 gram of Helium, i.e. 4 gram of Helium gas is equal to 1 mole of helium gas.

Solution :

• 4 gram of helium gas = 1 mole of helium gas
• 52 gram of helium gas is equal to :

$4 \: gram \: of \: helium \: gas = 1 \: mole \: of \: helium \: gas \\ 52 \: gram \: of \: helium \: gas \: = \frac{52}{4} moles \: of \: helium \: gas \\ = 13 \: moles \: of \: helium \: gas$

• Hence, 52 gram of helium gas is equal to 13 moles of helium gas.