question_answer

  3.42 g of sucrose are dissolved in 18 g of water in a beaker. Find the number of oxygen atoms in the solution. Calculate the ratio between the mass of one atom of hydrogen and mass of one atom of silver.  

Answer:

  Number of moles of sucrose                       1 mol of sucrose contains  atoms of oxygen mol of sucrose  contains atoms of oxygen atoms of oxygen Number of moles of water 1 mol of water contains  atom of oxygen Total number of oxygen atoms = Number of oxygen atoms from sucrose + Number of oxygen atoms from water Number of oxygen atoms in solution = 1.11 X Avogadro's number = 1.11 x 6.022 X 1023 = 6.68 x 1023.