Question

calculate the mass of given substances (A) 4 mole of H2O​

Answer 1

Answer:

Moles = mass/molar mass

Moles = 4

Molar mass of H2O = 1×2 + 16 = 18

4 = mass / 18

mass = 18×4

mass = 72 g

Therefore mass of 4 moles of H2O is 72 g

Pls follow....

Answer 2

Answer:

Explanation:

For one mole..

Mm= h×2+o

2+16×2= 18

Now for 4 mole...

1 mole into 4 : 18×4 =72 grams