Senior One No 6
7 Questions
| Total Attempts: 54
Questions and Answers
- 1.Suppose you were given the following problem: A 50.6 g sample of Mg(OH)2 is reacted with 45.0 g of HCl according to the reaction: Mg(OH)2 + 2 HCl --> MgCl2 + 2 H2O What is the theoretical yield of MgCl2?
- 2.Methane, CH4, burns in oxygen to give carbon dioxide and water according to the following equation: CH4 + 2 O2 ------> CO2 + 2 H2O In one experiment, a mixture of 0.250 mol of methane was burned in 1.25 mol of oxygen in a sealed steel vessel. Find the limiting reactant, if any, and calculate the theoretical yield, (in moles) of water.
- 3.The number of moles of carbon dioxide which contain 8 g of oxygen is
- A.
0.5 mol
- B.
0.20mol
- C.
0.40 mol
- D.
0.25 mol
- 4.The total no of ions present in 111 g of cacl2 is
- A.
1 mol
- B.
2 mol
- C.
3mol
- D.
4 mol
- 5.Which has maximum number of atoms ?
- A.
24g of c (12) 1
- B.
B) 56g of Fe (56)
- C.
27g of Al (27)
- D.
108g of Ag (108)
- 6.One mole of P4 molecules contain
- A.
1 molecule of p
- B.
4 molecule of p
- C.
(c) 1/4 x 6.022 1023 atoms of p
- D.
(d) 24.088 x 1023 atoms of p
- 7.One atomic mass unit is equivalent to
- A.
(a) 1.66 x 10-27
- B.
(b) 1.66 x10-27 kg
- C.
D) 1.66 x10-27 g
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