WorksheetsChemy 4 - Chemical Equations
Total questions: 10
Worksheet time: 13mins
The equation above represent the reaction between iron and chlorine.
Which of the following statement is correct?
2 moles of iron atoms react with 3 moles of chlorine atoms
2 moles of iron atoms react with 3 moles of chlorine molecules
2 moles of iron atoms react with 3 moles of chlorine molecules to produce 2 moles of iron(II) chloride
4 moles of iron atoms react with 6 moles of chlorine molecules to produce 2 moles of iron(II) chloride
Lime water turns to milky and a black solid is formed. Which of the following equations correctly represents the reaction?
A chemical reaction is represented by the following equation.
If 12 g of magnesium powder is reacted completely with hydrochloric acid, calculate the mass of magnesium chloride formed.
[ Relative atomic mass : Mg, 24 ; Cl, 35.5 ]
95 g
59.5 g
47.5 g
29.75 g
A chemical reaction is represented by the following equation.
If 50 g of zinc carbonate powder is reacted completely with sulphuric acid, calculate the volume of carbon dioxide gas released at room conditions.
[Relative atomic mass: Zn, 65; C, 12; O, 16; Molar volume: 24 dm3 mol-1 at room temperature ]
1.2 dm3
2.4 dm3
6.0 dm3
9.6 dm3
Calculate the maximum of lithium oxide formed when 3.5 g of lithium metal is heated completely in oxygen.
[Relative atomic mass: Li, 7; O, 16]
15 g
11.5g
7.50 g
5.75 g
Diagram show a graph of the volume of gas released against time for the reaction between calcium carbonate CaCO3 and excess hydrochloric acid, HCl.
What is the mass of calcium carbonate that had reacted?[Relative atomic mass: C,12; O,16, Ca, 40; Molar volume= 24 dm3 at room conditions]
0.10 g
0.15 g
0.20 g
0.25 g
A chemical reaction can be represented by the following equation:
CaCO3 + 2HNO3 -> Ca(NO3)2 + H2O + CO2
Which of the following are reactants?
H2O and CO2
HNO3 and CO2
CaCO3 and HNO3
Ca(NO3)2 ,H2O and CO2
When copper(ll) carbonate is heated, it decomposes to copper(ll) oxide and carbon dioxide gas.
If 4.80 dm3 of carbon dioxide gas produced, what is the mass of copper(ll) carbonate used?
[Relative atomic mass: C, 12; O, 16; Cu, 64; 1 mole of a gas occupies 24 dm3 at room conditions]
12.4 g
24.8 g
37.2 g
124.0 g
Which of the following chemical equations is correct?
2NaCl + AgNO3 —> AgCl2 + 2NaNO3
H2SO4 + NaOH —> NaSO4 + H2O
4K + O2 —> 2K2O
Fe(NO3)2 —> 2FeO + O2 + 2NO2
Which of the following chemical equations is balanced?
Na + H2O —> NaOH + H2
2NaI + Pb(NO3)2 —> PbI2 + NaNO3
MgCO3 + 2HNO3 —> Mg(NO3)2 + H2O + CO2
HCl + Na2S2O3 —> NaCl + SO2 + S + H2O
