WAEC - Chemistry (2006 - No. 4)
If 1 mole of sodium contains 6 x 1023 atoms, how many atoms are contained in 0.6 g of sodium? [Na = 23]
1.56 x 1023
1.56 x 1022
3.6 x 1023
3.6 x 1022
Explication
23g of sodium contain 6 x 1023 atoms :. 0.6g of sodium will contain \(\frac{0.6 x 6 x 1023}{23}/) = 1.56 x 1022