Question

A sanple of 45.8g of h2s04 contans how many moles of h204

Answer 1

Given :
(given mass) W = 45.8 g

To find : n (no of moles)

Formula : n = W/M

Solution :

M (molar mass) of H2SO4 = 2(H) + 1(S) + 4(O)
=2(1) + 1(32) + 4(16)
[as molar masses of H, S, O are 1, 32, 16 respectively]
=2+32+64
=98 g/mol

Hence, n = W/M = 45.8/98 = 0.467 mol