Chemistry
Grade-9
Easy
Question
Calculate the total ions & charge present in 4.2 gm of N–3.
- 8.67 × 104 C
- 867 × 104 C
- 8.67 × 105 C
- 8.67 × 106 C
Hint:
Charge of one electron is 1.6 
10-19 C.
The correct answer is: 8.67 × 104 C
Mass of N3- = 14g. Number of moles in 4.2g of N3- is 0.3.
The total number of ions = 0.3 6.022 1023
Total charge = 0.3 6.022 1023 3 1.6 10-19 C = 8.67 104 C
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