Question

find the number of mole or Convent into mole. 20g of o2 ions
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Answer 1

1.25 moles OR 7.52 × 10²³

Explanation:

Molar mass of O₂ = 16

We know that,

1 mole = molar mass of any substance

here

1 mole = 16

x moles = 20 g

x = 20 × 1/16

  = 1.25 moles

Number of moles or atoms in 20 g of O₂ will be

1.25 × 6.022 × 10²³ = 7.52 × 10²³