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Grade: 11
        Which of the following contain same number of atoms as in 20g of calcium?A. 24g of magnesiumB. 12g of carbonC. 8g of oxygen gasD. 16g of oxygen atom
9 months ago

Answers : (1)

Arun
13925 Points
							
we have to find how many moles of calcium is present in 20 g of it. From the Periodic table, the relative atomic mass of calcium is 40.1. 

No. of moles of calcium = 20/40.1 = 0.49875 moles  = 0.5 mole
 
Now
Find only moles in every case. If moles are same then ni of atoms will be same also.
 
Regards
Arun (askIITians forum expert)
9 months ago
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