1.

a. Group the following into pairs having same number of atoms.A. 2g Hydrogen B. 16g Oxygen C. 14g Nitrogen D. 8g Helium (Atomic mass H=1, O= 16, N =14, He=4) b. How many atoms are present in each pair?

Answer»

a. A, D2g Hydrogen, 8g Helium 

B, C 16g Oxygen, 14g Nitrogen 

b. A, D – 2 x 6.022 × 1023 

B,C – 6.022 x 1023



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