Question

How many grams moles of h2so4 are present in 4.9 gram of acid ? how many atoms of hydrogen and oxygen are present in 4.15 mole of water?​

Answer 1

Answer:

1) 4.9g of H2SO4

​atomic weight =2 + 32 + 4 × 16

=98g / mol

Moles =

atomic weight / gram weight

​

= 4.9 / 98  = 0.05 moles

2)

6.022 x 10^23 x 0.15

=> 9.03 x 10^22 atoms of Oxygen

H atoms = N A x 0.15 x 2

=> 6.022 x 10^23 x 2 x 0.15

=> 1.81 x 10^23 H atoms