Question

Q1 - What is the mass of 3 gram atoms of calcium?
(1 Mark)
Q2-Calculate the mass of CaCO3 which is required to react with 25 ml of 0.75 M HCI.
(5 Marks)
Q3 - During preparation of ammonia by Haber's process 30 L of H2 and 30 L of N2 are mixed. The yield
of NH3was 50%. Find the composition of gaseous mixtures,
(3 Marks)
04 -Potassium bromide (KBr) contains 32.9% potassium by mass. If 6.40 g of Brz is made to react with
3.60 g of potassium, find the actual mass of potassium which reacts with bromine.
(2 Marks
05 - One atom of an element weighs 1.8 x 10
-22
22 9. What is the atomic mass of element?
(1 Mark)
06 Chlorophyll contains 2.7% of Magnesium by mass. The number of magnesium atoms present in
4.00g of chlorophyll is
(3 Marks)​

Answer 1

Answer:

1 Mark)

Q2-Calculate the mass of CaCO3 which is required to react with 25 ml of 0.75 M HCI.

(5 Marks)

Q3 - During preparation of ammonia by Haber's process 30 L of H2 and 30 L of N2 are mixed. The yield

of NH3was 50%. Find the composition of gaseous mixtures,

(3 Marks)

04 -Potassium bromide (KBr) contains 32.9% potassium by mass. If 6.40 g of Brz is made to react with

3.60 g of potassium, find the actual mass of potassium which reacts with bromine.

(2 Marks

05 - One atom of an element weighs 1.8 x 10

-22

22 9. What is the atomic mass of element?

(1 Mark)

06 Chlorophyll contains 2.7% of Magnesium by mass. The number of magnesium atoms present in

4.00g of chlorophyll is

(3 Marks)​

Explanation: