question_answer

  If 3.42 g of sucrose is dissolved in 18 g of water in a beaker, then what will be the number of oxygen atoms in the solution?

Answer:

  Step 1 Molar mass of sucrose, 342 g of sucrose = 1 mole sucrose 3.42 e of sucrose mole sucrose 1 mole of sucrose  contains O atoms 0.01 mol of sucrose will contain O atoms = 0.01x 11x 6.023 x1023 = 6.6242x 1022     Step 2 18 g water  = 1 mol O atoms  atoms           Step 3 By adding the number of O atoms present in 3.42 g sucrose and 18 g water, we get