Question

1. calculate the number of moles present in 100 g NaCl solution.
2. Calculate the number of atoms present in 90 ml of water​

Answer 1

Explanation:

no of moles of nacl = 100/58.5 =

To find no. of atoms in 90ml of water , first find moles , density of water is 1gr/ml

therefore mass of 90ml of water is 90g

moles = 90/18 = 5

no. of atoms in 90ml of water(H20) = moles × no. of atoms in one mole of compound(3=2H+1 O)

= 5 × 3 × 6.023 × 10 to the power 23

calculate these and you get the exact answer

hope this helps

please marks as brainliest