Problems on mole fractions-Class worksheet 02 Revision: 16 g of occupies 5.6 litre at STP. Assuming ideal gas nature. The value of x is: (a) 1(b) 2(c) 3(d) None of these How many moles of lead (II) chloride will be formed from a reaction between 6.5 g PbO and 3.2g HCl? 1. What is the mole fraction of carbon tetrachloride (CCl 4) in solution if 3.5 moles of CCl4 is dissolved in 8.5 moles of benzene (C6H6)? 2. What is the mole fraction of formaldehyde (CH2O) in solution if 25.7 grams of CH2O is dissolved in 3.25 moles of carbon tetrachloride (CCl4)? 3. Calculate the mole fraction of HCl in a solution of hydrochloric acid in water, containing 36% HCl by weight. 4. The dead sea contains approximately 332 grams of salt per kg of sea water. Assume that this salt is all sodium chloride(NaCl). Calculate the mass percent of NaCl. 5. The mole fraction of NaCl in water is 0.22. What is its mass percent? 6. The mass fraction of KCl in its aqueous solution is 0.051. What is the mole fraction of potassium chloride in the solution? HOTS: The density of liquid (mol. wt. = 70) is 1.2 g /ml . If 2 mL of liquid contains 35 drops, the number of 1.2 1 1.2 × NA × NA × NA 2 molecules of liquid in one drop are : (a) 2.5 (b) 35 (c) 35 (d) 1.2 NA Problems on mole fractions-Class worksheet 02 Revision: 16 g of occupies 5.6 litre at STP. Assuming ideal gas nature. The value of x is: (a) 1(b) 2(c) 3(d) None of these How many moles of lead (II) chloride will be formed from a reaction between 6.5 g PbO and 3.2g HCl? 1. What is the mole fraction of carbon tetrachloride (CCl 4) in solution if 3.5 moles of CCl4 is dissolved in 8.5 moles of benzene (C6H6)? 2. What is the mole fraction of formaldehyde (CH2O) in solution if 25.7 grams of CH2O is dissolved in 3.25 moles of carbon tetrachloride (CCl4)? 3. Calculate the mole fraction of HCl in a solution of hydrochloric acid in water, containing 36% HCl by weight. 4. The dead sea contains approximately 332 grams of salt per kg of sea water. Assume that this salt is all sodium chloride(NaCl. Calculate the mass percent of NaCl. 5. The mole fraction of NaCl in water is 0.22. What is its mass percent? 6. The mass fraction of KCl in its aqueous solution is 0.051. What is the mole fraction of potassium chloride in the solution? HOTS: The density of liquid (mol. wt. = 70) is 1.2 g /ml . If 2 mL of liquid contains 35 drops, the number of 1.2 1 1.2 × NA × NA × NA 2 molecules of liquid in one drop are : (a) 2.5 (b) 35 (c) 35 (d) 1.2 NA
