CHEMISTRY YEAR 10 – FINAL TEST REVISION 2

NAME

PART A:

Use the following relative atomic masses if required.

Cl 35.5 O 16H 1C 12Be 9N 14Fe 56K 39

Avogadro’s No is 6.02x1023

  1. What is the molecular mass of:
  1. Cl2 (1)
  2. Fe(OH)3(1)
  3. K2CO3(1)
  1. In 99.75g of Be(NO3)2
  1. How many moles of Be(NO3)2 are there?(1)
  2. How many moles of NO3 ions are there are?(1)
  3. How many moles of O atoms are present?(1)
  4. What mass of oxygen is present?(1)
  1. What number of molecules is present in 2.5 mole of O2 gas? (1)
  1. What number of atoms is present in 2.5 mole of O2 gas? (1)
  1. How many moles are present when there are 1.0535 x1023 particles of any compound?(1)

PART B:

Use the following relative atomic masses if required.

Al 27 O 16H 1C 12Ca 40N 14

Avogadro’s No is 6.02x1023Molar volume of a gas at STP is 22.4 L

  1. Calculate the number of moles of CO2 gas present at STP in 4.1888 L.(1)
  1. What is the mass of CO2 present in 4.1888 L?(2)
  1. What is the number of molecules present in 4.1888 L of CO2?(2)
  1. How many moles of CaCO3are present 72 g?(1)
  2. How many moles of O atoms are present?(2)
  3. What mass of oxygen is present?(2)
  4. Which element contributes least to the mass? (1)

PART C:

Use the following relative atomic masses if required.

O 16H 1C 12Ca 40S 32

Molar volume of a gas at STP is 22.4 L

  1. Sulphuric acid and Aluminium combine as shown below in the unbalanced equation:

H2SO4 + Al → Al2(SO4)3 + H2

  1. Balance the equation.

When 2.8 moles of H2SO4 are reacted:

  1. How many moles of Hydrogen are produced?(1)
  2. How many moles of Aluminium are consumed?(1)
  3. How many moles of Aluminium Sulphate will form?(1)
  1. Ca(HCO3)2 and HCl react forming CO2 as one of the products
  1. Write a balanced equation when Ca(HCO3)2 and HCl react.(2)
  2. What mass of CO2 is released when 40g of Ca(HCO3)2 is placed in 6 moles of HCl?(3)
  3. What volume does this CO2 occupy at STP?(2)

PART D:

Use the following relative atomic masses if required.

O 16H 1C 12Cu 65P 31Sn 119

Molar volume of a gas at STP is 22.4 L

  1. Phosphoric acid and Tin (VI) combine as shown below in the unbalanced equation:

H3PO4 + Sn → Sn(PO4)3 + H2

  1. Balance the equation.

When 2.5 moles of H3PO4 are reacted:

  1. How many moles of Hydrogen gas are produced?(1)
  2. How many moles of Tin are consumed?(1)
  3. How many moles of Tin Phosphate will form?(1)
  1. CuCO3 and HNO3 react forming CO2 as one of the products
  1. Write a balanced equation when CuCO3 and HNO3 react.(2)
  2. What mass of CO2 is released when 350g of CuCO3 is placed in 8 moles of HNO3?(3)
  3. What volume does this CO2 occupy at STP?(2)