d) 0.01 Part X 66, 12+H, 2 HI In the reaction represented above, what mass of HI

Question

d) 0.01 Part X 66, 12+H, 2 HI In the reaction represented above, what mass of HI is produced by the reaction of 2.0 x 10 molecules H2 with excess I2? a) 94 g b) 85g c)64g d) 43 g 67. What is the empirical formula of an oxide of sulfur if the compound contains 16 g of sulfur for every 24 g of oxygen? a) SO b) SO, C) SO, d) s,o, 68. A student prepares a solution by dissolving 90.0 g glucose (molar mass 180.2 g mol') in enough water to make 0.250 L solution. The molarity of the solution should be reported as a) 2.00 M b) 2.000 M c) 8.00 M d) 8.000 M

Explanation / Answer

Given

No. of atoms = 2.0 * 1023 atoms of H2  

No. of moles = 2.0 * 1023 / 6.023 * 1023 = 0.332 moles

Molar mass of H2 = 2 g/mol

1 mole of H2 will produce 2 mole of HI

0.332 moles of H2 will produce 0.664 mole of HI

Molar mass of HI = 127.9 g/mol

Mass of HI = No. of moles of HI * Molar mass = 0.664 mol * 127.9 g/mol = 84.94 g

Answer (b) 85 g

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