Question

Urgent! Dau coroană ​

Answer 1

V H2O = 1 m^3

ro H2O = 1000 kg/m^3

ro = m/V ==> m = roV = 1000 kg

n = m/M(nr moli)

M H2O = 18 kg/kmol ==> n = 1000 kg / 18 kg/kmol ~= 55,5 kmol = 5,55 * 10^4 mol

N = mNrA  (m * nr avogadro)

N = 5,55 * 10^4 * 6,022 * 10^23 = 33,4221 * 10^27 molecule H2O