Question

No of molecules in 100ml of 0.02m H2SO4 is

Answer 1

Explanation:

firstly find number of moles then multiply it by avagadro number to get the number of molecules ..

for finding number of moles use the formula of molarity that we have studied in class 9th cbse..

i.e. molarity = no. of moles / volume in litre

let put the values

we get,

0.02= no. of moles×1000/100

0.02 = 10 no. of moles

no. of moles = 2×10^-3

so the number of molecules will be 2×10^-3 ×6.022 × 10^23

we get, 12.044×10^20 is the number of molecules..

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