Question

How many molecules are present in 36gram of water

Answer 1

$\large{explanation}$

given maas of h2o=36gram

molar mass of H2O=atomic mass of hydrogen +(2Xatomic mass of oxygen)

molar mass of H2O=2+(2X16)

molar mass if H2O=34u

formula

$no \: of \: moles = \frac{given \: mass}{molar \: mass}$

$no \: of \: moles = \frac{36g}{34u}$

$no \: of \: moles = 1.058mol \: approx$