A gas cylinder contains 5.0 kg of propane. How many propane molecules are in the cylinder? The Avogadro constant, L = 6.022 × 1023 mol–1

Mass of Calcium Atom =40.08g

M = 28.01 g/mol6.0 / 28.01 = 0.2142 mol0.2142 mol x L = 0.2142 mol x 6.022 × 1023 mol–1= 1.3 x 1023 molecules of N2Each molecule contains 7 protons...

 one mole of diatomic oxygen (O2) = 5.0234 mol

1 mole of any substance has 6.02 x 1023 molecules. So, in our case we have 1 mole of water.

Solution:Moles of propane = 1.09×10-1 moles = 0.109 molesOne mole of any substance contains 6.022×1023 atoms/molecules.Hence,Number of propane molecules = 0.109 mol × (6.022×1023 molecules / 1 mol) = 6.56×1022 moleculesAnswer: 6.56×1022 molecules...

Solution:One mole of any substance contains 6.022×1023 atoms/molecules.Hence,Moles of BCl3 = (1.3×1023 molecules of BCl3) × (1 mol / 6.022×1023 molecules) = 0.2159 mol BCl3Moles of BCl3 = Mass of BCl3 / Molar mass...

0.5 mol I2 and 0.5 mol Cl- will not react with anything; 2 mol I- will react with one mol of Cl2 producing one mol of I2: 2I- + Cl2...

Answer:n = N/Na = 1.90x10^23 / 6.02x10^23 = 0.306 mole V = n*VmV = 0.306*22.4 = 6.86 litre

If the mass is 5.72 * 10-3 grams, and the molar mass of silicon is 28, then the number of moles of silicon (5.72 * 10-3)/28 = 2,04*10-4. The Avogadro number...

Volume = 22.4/4 = 5.6So1.00 g of He will have greatest volume at STP