1.

Find no. of protons in 180 ml H_(2)O . Density of water =1 gm/ml.

Answer»

SOLUTION :MASS of WATER=density `xx` volume=180g
Moles of water `=(180)/(18)=10`
1 mol water has 10 mol PROTONS
10 mol water has 100 mol protons
10 mol water has 100 `N_(A)` protons
10 mol water has `6.023xx10^(25)` protons


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