9701_w13_qp_13
A paper of Chemistry, 9701
Questions:
40
Year:
2013
Paper:
1
Variant:
3
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7
Measured values of the pressure, volume and temperature of a known mass of a gaseous compound are to be substituted into the equation pV = nRT. The measurements are used to calculate the relative molecular mass, Mr, of a compound. Which conditions of pressure and temperature would give the most accurate value of Mr?
4. States of matter  →  4.1. The gaseous state: ideal and real gases and \( pV = nRT \)
2. Atoms, molecules and stoichiometry  →  2.1. Relative masses of atoms and molecules
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10
Nitrogen reacts with hydrogen to produce ammonia. N2+ 3H22NH3A mixture of 1.00 mol of nitrogen, 3.00 mol of hydrogen and 1.98 mol of ammonia is allowed to reach equilibrium in a sealed vessel under certain conditions. It was found that 1.64 mol of nitrogen were present in the equilibrium mixture. What is the value of Kc under these conditions?
12. Nitrogen and sulfur  →  12.1. Nitrogen and sulfur
7. Equilibria  →  7.1. Chemical equilibria: reversible reactions, dynamic equilibrium
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12
Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the propellant in some fireworks. The reaction produces the metal oxides and nitrogen. 10Al + 3Ba(NO3)2 → 5Al 2O3 + 3BaO + 3N2 Which mass of barium oxide is produced when 5.40 g of aluminium powder reacts with an excess of anhydrous barium nitrate?
2. Atoms, molecules and stoichiometry  →  2.4. Reacting masses and volumes (of solutions and gases)
10. Group 2  →  10.1. Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds
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13
The diagram shows some applications of compounds of Group II elements. calcium carbonate magnesium oxide used as a refractory lining in furnaces or kilns used as a building material used to manufacture an agricultural chemical to adjust soil pH Which numbered links are correct?
10. Group 2  →  10.1. Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds
3. Chemical bonding  →  3.2. Ionic bonding
13. An introduction to AS Level organic chemistry  →  13.1. Formulas, functional groups and the naming of organic compounds
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19
Use of the Data Booklet is relevant to this question. Elements J and K react together to form compound L. Elements J and K are both in Period 3. Element J has the smallest atomic radius in Period 3. There are only two elements in Period 3 which have a lower melting point than element K. Which compound could be L?
9. The Periodic Table: chemical periodicity  →  9.1. Periodicity of physical properties of the elements in Period 3
9. The Periodic Table: chemical periodicity  →  9.2. Periodicity of chemical properties of the elements in Period 3
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