Question

How many moles are in 22grams of Argon?

Answer 1

Answer:

number of moles are the amount of substance of an element .

number of moles can be calculated as follows;

number of moles = mass present / molar mass of element

molar mass of Ar - 40 g/mol

number of moles of Ar = 22 g / 40 g/mol = 0.55 mol .

there are 0.55 mol of Ar

Explanation:

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Answer 2

we have to find the no of moles in 22 g Argon.

solution : atomic mass of Argon = 40 g/mol

given mass of Argon = 22 g

we know,

      no of moles of an element = given mass/atomic mass of that element

so no of moles of Argon = 22g/40g/mol = 0.55 mol

therefore the no of moles in 22g Argon is 0.55 mol

[ if you need to find the no of atoms of Argon, you will use, no of atoms = no of moles × Avogadro's number , where Avogadro's number = 6.023 × 10²³

in case of STP/NTP , no of moles of an ideal gas = given volume/22.4L]