Exercise 9.1 solutions

class 10 exercise 8.4 question 4 part 1and2

Q5 exercise- 2.1

Q4 exercise- 2.1

The molality of a 1 L solution with x % H_2SO_4 is 9. The weight of solvent present in the solution is 910 grams. The value of x is :

Calculate the number of moles of methanol in 9 litres in its 2m solution, if the density of the solution 0.981kgL^(-1) (molar mass of methanol =32g "mol"^(-1) )

The above bar graph shows the number of calories burned per minute for three types of exercise , assuming that the exercise is performed vigorously. Jackie spent an hour exercising vigorously . She spent twice as much time doing aerobics as she did walking, and 1 1/2 times as much time swimming as she did aerobics . According to the graph, how many calories did Jackie expect to burn during that hour of exercise ?

The pH of a solution of sodium hydroxide is 9. What will be its pH when this solution is diluted?

The sum of the solutions of the equations 9^(x) - 6.3^(x) +8 = 0 is

Q1 exercise- 2.1 part - 1