Question

question number 17........

Answer 1

Answer:

No. of molecules=No of moles x Avogadro number

1)No of moles=Mass/Molar mass=4/2= 2 mol

2)No of moles=18/18=1 mol

3)No of moles=Volume in liters/22.4=24/22.4≈1 mol

4)No of moles=66/44=1.5 mol

therefore, 4 g of hydrogen is the correct answer