An IB Periodic Table is required Calculators should not be used for multiple choice questions! |
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1. How many molecules are in 227cm3 of ammonia gas, NH3, at stp?
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2.Three identical containers are filled with gases under the same conditions as shown in the diagram below: Which statement is true? |
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3. How many atoms are there in 45.4dm3 of nitrogen dioxide gas, NO2, at stp?
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4. 100cm3 of butane was burned completely in oxygen. What volume of oxygen was used and what volume of carbon dioxide was formed? 2 C4H10(g) + 13 O2(g) → 8 CO2(g) + 10 H2O(l) |
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5. 0.56g of a gaseous compound occupied 454cm3 at stp. What is the molar mass of the gas?
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6. 200cm3 of methane was reacted with 600cm3 of oxygen. What is the total volume of all gases at the end of the reaction?
CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l)
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7. Which of the following contains the greatest number of atoms? All gas volumes measured at stp.
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8. 40 dm3 of hydrogen sulphide was burned in 100 dm3 of oxygen as shown:
2 H2S(g) + 3 O2(g) → 2 H2O(g) + 2 SO2(g) What volume of gaseous product formed and what volume of oxygen remained? |
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9. 20cm3 of a hydrocarbon CxHy produced 120cm3 of carbon dioxide and 120cm3 of water vapour when burned completely in excess oxygen. What is the formula of the hydrocarbon?
All gas volumes were measure under the same conditions of temperature and pressure.
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10. What volume of oxygen gas will be formed at stp when 2.40 x 1022 electrons flow in the circuit during the electrolysis of dilute sulfuric acid?
2 H2O → O2 + 4 H+ + 4 e- |
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