Total number of electrons present in 1.8 grams of water is

(a) 6.023x10^22

(b) 6.023x10^24

(c) 18x10^23

(d) 6.023x10^23

1 mole of water = 18 grams (you can find this by finding mass of two hydrogen and one oxygen which is (1*2) + 16 = 18)

1.8 grams = 0.1 moles

1 H2O molecule has 10 electrons so 0.1 moles can be computed as:

(6.023*10^23) * (0.1) * 10 = 6.023*10^23 electrons