Question

17. 4 g of hydrogen reacts with 20 g of oxygen to form
water. The mass of water formed is
(1) 24 g
(2) 36 g
(3) 22.5 g
(4) 40 g​

Answer 1

Explanation:

h2 moles =8.7

oxygen moles = 20/32=0.625

mole/sc=8.7

moles/sc=1.25

therfore water formed = 1.25

=5/4 moles

mass = 5/4×18 = 5×4.5=22.5