# Senior One No 6

7 Questions | Total Attempts: 54

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• 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