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WorksheetsIB Chemistry Stoichiometry multiple choice Past papers based
Total questions: 10
Worksheet time: 17mins
What is the total number of ions present in the formula, Al2(SO4)3?
2
3
5
6
What is the empirical formula of a compound containing 50% by mass of element X (Ar = 20) and 50% by mass of element Y (Ar = 25)?
XY
X3Y2
X4Y5
X5Y4
Methane, CH4, burns in Oxygen gas to form Carbon Dioxide and water. How many moles of Carbon Dioxide will be formed from 8.0 g of Methane?
0.25
0.50
1.0
2.0
A 4 g sample of Sodium Hydroxide, NaOH, is dissolved in water and made up to 500 cm3 of aqueous solution. What is the concentration of the resulting solution?
0.1 mol dm–3
0.2 mol dm–3
0.5 mol dm–3
1.0 mol dm–3
Sodium reacts with Water as shown below.
__ Na + __ H2O --> __ NaOH + __ H2
What is the total of all the coefficients when the equation is balanced using the smallest possible whole numbers?
3
4
6
7
Calcium Carbonate decomposes on heating as shown below.
CaCO3 --> CaO + CO2
When 50 g of Calcium Carbonate are decomposed, 7 g of Calcium Oxide are formed. What is the percentage yield of Calcium Oxide ?
7%
25%
50%
75%
A cylinder of gas is at a pressure of 40 kPa. The volume and temperature (in K) are both doubled. What is the pressure of the gas after these changes?
10 kPa
20 kPa
40 kPa
80 kPa
Which solution contains 0.1 mol of Sodium Hydroxide?
1 cm3 of 0.1 mol dm–3 NaOH
10 cm3 of 0.1 mol dm–3 NaOH
100 cm3 of 1.0 mol dm–3 NaOH
1000 cm3 of 1.0 mol dm–3 NaOH
The equation for a reaction occurring in the synthesis of Methanol is
CO2 + 3H2 --> CH3OH + H2O
What is the maximum amount of Methanol that can be formed from 2 mol of Carbon Dioxide and 3 mol of Hydrogen?
1 mol
2 mol
3 mol
5 mol
Which contains the same number of ions as the value of Avogadro’s constant?
0.5 mol NaCl
0.5 mol MgCl2
1.0 mol Na2O
1.0 mol MgO
