Question

which of the following contains same no. of atoms as 20 g of Ca
1. 24g of Mg
2. 12g of carbon
3. 8g of O2
4.16 g of O2
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Answer 1

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Answer 2

Answer:

moles of C =

moles of C = 12

moles of C = 1212

moles of C = 1212

moles of C = 1212 =1

moles of C = 1212 =1moles of Ca =

moles of C = 1212 =1moles of Ca = 40

moles of C = 1212 =1moles of Ca = 4020

moles of C = 1212 =1moles of Ca = 4020

moles of C = 1212 =1moles of Ca = 4020 =0.5

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O =

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 16

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632 =2

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632 =2moles of K =

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632 =2moles of K = 39

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632 =2moles of K = 3940

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632 =2moles of K = 3940

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632 =2moles of K = 3940 =1.025

moles of C = 1212 =1moles of Ca = 4020 =0.5moles of O = 1632 =2moles of K = 3940 =1.025As 1 mole of every element contains Avogadro number of atoms. Hence, Equal number of moles of different elements will contain same number of atoms. Therefore, 12 g of Magnesium will have same number of atoms as in 20 g of Calcium.

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