(a) CO2 has molar mass = 44 g mol-1 5 moles of Co2 have molar mass = 44 x 5 = 220 g H20 has molar mass = 18 g…
Molecular formula of calcium carbonate = CaCO3 Molecular mass of CaCO3 = 1 × Ca + 1 x C + 3 × 0 = 1 x 40 u + 1…
Molecular mass of alumina (Al203) = 2 × Al3+ + 3 × 02- = 2 × 27 u + 3 × 16u = 102 u Gram molecular mass = 102…
(i) 1 mole of CO2 = 44 g = 6.02 x 1023 molecules i.e., 6.02 x 1023 molecules of CO2 = 44 g of CO2 1023 molecules of…
(a) Mass of sodium atoms carried by Krish = (5 x 23) g = 115 g Mass of carbon atoms carried by Raunak = (5 × 12) g = 60…
(a) No. of moles of sodium = 46/23 = 2 moles We know that one mole of sodium contains 6.022 x 1023 atoms. ∴ 2 moles of sodium…
Molecular mass of NaCl = (1 x 23 + 1 x 35.5) u = 58.5 u Atomic mass of sodium = 23 u Mass per cent of Na = (Atomic…
(i) 1 mole of oxygen contains 6.022 x 1023 atoms ∴ 6.022 x 1023 atoms of oxygen = 1 mol 1 atom of oxygen = 1 / 6.022 ×…
(a) 1 mol of water contains 6.022 × 1023 molecules ∴ 0.5 mol of water contains 6.022 × 1023/2 molecules …
(a) One mole represents 6.022 × 1023 entities of a substance. (b) One mole of an element contains 6.022x 1023 atoms of the element. (c) One mole of a substance…