Answer these questions plz

Q6. 0.1-gram mole of urea is dissolved in 100g of water. The molality of the solution is
(A) 1 m
(B) 0.01 m
(C) 0.1 m
(D) 10 m

Q7 The molality of 5.85% (w/w) NaCl solution is nearly
(A) 0.02 m
(B) 1.06 m
(C) 0.85 m
(D) 1.25 m

Q8 6 g of Urea dissolved  in 90 g of water, the mole fraction of salute is
(A) 1/5
(B) 1/50
(C) 1/51
(D) 1/501