Question

calculate the number of molecules in 8g of oxygen atomic mass of oxygen is 16u​

Answer 1

Explanation:

moleculer mass of any gas contains 1 mole molecules….. for o2 … o2 has 32 gm moleculer mass …. No.of moles=given mass÷ moleculer mass

No. Of moles of o2= 8÷32= .25 moles

So no. Of molecules= .25 × 6.024×10^24

Answer 2

Answer:

3x10^23 molecules

Explanation:

6x10^23 = 16 g

Y = 8

Y = 6x10^23x 8 / 16

Y = 3x 10^23 molecules

Hope it helps you