Question

2.1 Calculate the mass percentage of benzene (CH) and carbon tetrachloride
(CC1) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.
2.2 Calculate the mole fraction of benzene in solution containing 30% by
mass in carbon tetrachloride.
2.3 Calculate the molarity of each of the following solutions: (a) 30 g of
Co(NO3)2. 6H 0 in 4.3 L of solution (b) 30 mL of 0.5 M H2SO4 diluted to
500 mL
2.4 Calculate the mass of urea (NH,CONH) required in making 2.5 kg of
0.25 molal aqueous solution.
2.5 Calculate (a) molality (b) molarity and (c) mole fraction of KI if the density
of 20% (mass/mass) aqueous KI is 1.202 g ml.​

Answer 1

Answer:

please see the image will be helpful for