Federal 9th Chapter 6 (Solutions)

1. The maximum amount of sodium acetate that dissolves in 100g of water at 0^oC is119g and 170g at 100^oC. If you place 170g of sodium acetate in 100g of water at 0^oC , the resulting solution would be.

a. unsaturated
b. saturated
c. supersaturated
d. 1M

2. How many moles of sodium atoms are present in 2.3g of sodium

a. 1
b. 1.5
c. 0.1
d. 0.17

3. What is the mass of 5 moles of hydrogen gas

a. 5g
b. 5.04g
c. 10.08g
d. none

4. How many atoms are there in 28g of nitrogen gas

a. 2
b. 1
c. N_a
d. 12.04

5. How many atoms are there in 0.1 mole of carbon

a. 6.022 * 10²³
b. 6.022 * 10²²
c. 6.022 * 10²⁴
d. none

6. A solution of NaOH has a concentration of 4g/dm3. What is the mass of NaOH contained in 250cm3 of this solution?

a. 40g
b. 20g
c. 1g
d. 2g

7. Which of following solution is more dilute

a. 1M
b. 2M
c. 0.1M
d. 0.009M

8. A solution of NaOH contains 20g of this compound in 2dm3 of solution. What is the molarity of this solution

a. 2M
b. 1M
c. 0.25M
d. 0.5M

9. Which quantity is the same for one mole of hydrogen gas and one mole of water

a. mass
b. no of atoms
c. no of molecules
d. no of gram atomic mass

10. If one mole of Na contain x atoms of sodium. What is the number of moles contained in 46g of sodium

a. x
b. 2x
c. 3x
d. 1.5x