Mass of 1 atom of Hydrogen is _____
1.66 g
1.67 g
6.022 g
Molar mass is mass of 1 mole of that substance.
∴6.022×1023× H atoms =1g ∴ 1 H atoms =xg By unitary method (cross multiplication)⇒1×1=x×6.022×1023⇒x=16.022×1023⇒x=0.166×10−23⇒x=1.66×10−24g
Question 9 3.42 g of sucrose are dissolved in 18g of water in a beaker. The number of oxygen atoms in the solution are (a) 6.68×1023 (b) 6.09×1022 (c) 6.022×1023 (d) 6.022×1021
One mole of oxygen gas at STP is equal to...........
(a) 6.022×1023 molecules of oxygen
(b) 6.022×1023 atoms of oxygen
(c) 16 g of oxygen
(d) 32 g of oxygen