How many grams are there in the following?
i) 1 mole of chlorine molecule, Cl2 ii) 2 moles of sulphur molecules, S8
iii) 4 moles of ozone molecules, O3 iv) 2 moles of nitrogen molecules, N2
TNSCERT Class 10 Chemistry Ch 10 Atoms and Molecules
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number of moles, n= w/M
weight,w = n×M
i)1 mole Cl2
M= 35.5×2 =71 g
weight,w = 1×71 = 71 gm
ii)2 moles of S8
M= 8×32 = 256 g
weight =2×256 = 512 gm
iii)4 moles of O3
M= 3×48 =144 g
weight,w = 4×144 = 576 gm
iv)2 moles of N2
M= 2×14 =28 g
weight, w= 2×28 = 56 gm
weight,w = n×M
i)1 mole Cl2
M= 35.5×2 =71 g
weight,w = 1×71 = 71 gm
ii)2 moles of S8
M= 8×32 = 256 g
weight =2×256 = 512 gm
iii)4 moles of O3
M= 3×48 =144 g
weight,w = 4×144 = 576 gm
iv)2 moles of N2
M= 2×14 =28 g
weight, w= 2×28 = 56 gm
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