Question

What is the no. Of molecules of co2 which contain 8g of o2?

Answer 1

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##ANSWER##↡↡↡↡↡↡↡↡↡↡↡↡↡↡↡↡↡↡

Mass of Oxygen = 8 g

Molar mass of Oxygen =32g mol ⁻¹

Number of moles of Oxygen = 8 / 32 moles

= 0.25 moles

1 mole of CO₂ will contain 1 mole of Oxygen

∴ 0.25 mole of oxygen is present in 0.25 moles of CO₂

Answer 2

Answer:

1.50 x10^23 is correct answer

Explanation:

32g o2 has 1 mol co2

8g o2 = 1x8/32 = 0.25

1 mol o2 = 6.022x10^23

so

6.25 mole o2 = 6.022x10^23 x0.25 = 1.5 x 10 ^23 ans