Question

1. One mole of each of the following compounds is burnt in excess oxygen. Which compound will produce three moles of carbon dioxide and three moles of steam only?
a. C3H8
b. C3H7OH
c. C3H7CO2H
d. CH3CO2CH3

2. 20 cm3 of carbon monoxide are reacted with 10 cm3 of oxygen. The equation for the reaction is shown:
2CO + O2 --> 2CO2
Which volume of carbon dioxide will be produced?

a. 10 cm3
b. 20 cm3
c. 30 cm3
d. 40 cm3

3. What has a mass equal to that of one mole of water?
a. 24  dm3 of water
b. one mole of steam
c. one molecule of water
d. two moles of hydrogen molecules and one mole of hydrogen molecules

4. An 8 g sample of oxygen contains the same number of atoms as 16 g of element X. What is the relative atomic mass, Ar of X?
a. 4
b. 8
c. 16
d. 32

5. Which quantity is the same for one mole of ethanol and one mole of ethane?
a. mass
b. number of atoms
c. number of molecules
d. volume at r.t.p.

6. Which ion is present in the highest concentration in a 2 mol/dm3 aqueous solution of sodium sulphate?
a. hydrogen ions
b, hydroxide ions
c. sodium ion
d. sulphate ion

7. Magnesium reacts with hydrochloric acid. Which solution would give the fastest initial rate of reaction?
a. 40 g of HCl in 1000 cm3 of water
b. 20 g of HCl in 1000 cm3 of water
c. 10 g of HCl in 100 cm3 of water
d.  4 g of HCl in 50 cm3 of water

8. One mole of hydrated copper(II) sulphate, CuSO4.5H2O is dissolved in water. How many moles of ions does the solution contain?
a. 1
b. 2
c. 6
d. 7

9. What is the ratio of the volume of 2 g of hydrogen to the volume of 16 g of methane, both volumes at r.t.p.?
a. 1 to 1
b. 1 to 2
c. 1 to 8
d. 2 to 1

10. Which of the following contains the same number of molecules as 9 g of water?
a. 2 g of hydrogen gas
b. 14 g of nitrogen gas
c. 32 g of oxygen gas
d. 44 g of carbon dioxide gas

11. Calcium reacts with water as shown.
Ca (s) + 2H2O (l) --> Ca(OH)2 (aq) + H2 (g)

What is the total mass of the solution that remains when 40g of calcium reacts with 100 g of water?​

Answer 1

the questions are so long to answer ...and points only 5 points ?? ....this is not fair