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  1. Problems
  2. /Chemical Reactions
  3. /Chemical Equations

Chemical Equations

Chemistry
+ Upload a Problem
More in Chemical ReactionsChemical EquationsTypes of Chemical ReactionsEnergy Changes and Corrosion
14 problems
Type:
1.
24 g of methane burns completely: CH₄ + 2O₂ → CO₂ + 2H₂O.
High School (9–10), General · Chemical Equations, Energy Changes and CorrosionStemPy LabStemPy Lab
Hard
2.
8 g of hydrogen burns in oxygen: 2H₂ + O₂ → 2H₂O.
High School (9–10), General · Chemical Equations, Energy Changes and CorrosionStemPy LabStemPy Lab
Medium
3.
Zinc reacts with sulphuric acid: Zn + H₂SO₄ → ZnSO₄ + H₂.
High School (9–10), General · Chemical Equations, Energy Changes and CorrosionStemPy LabStemPy Lab
Medium
4.
200 g of calcium carbonate is heated until it has all broken up: CaCO₃ → CaO + CO₂.
High School (9–10), General · Chemical Equations, Energy Changes and CorrosionStemPy LabStemPy Lab
Medium
5.
Ethanol burns in a spirit lamp: C₂H₅OH + O₂ → CO₂ + H₂O.
High School (9–10), General · Chemical EquationsStemPy LabStemPy Lab
Hard
6.
Balance each equation. Keep each group of atoms together.
High School (9–10), General · Chemical EquationsStemPy LabStemPy Lab
Medium
7.
Red-hot iron reacts with steam: Fe + H₂O → Fe₃O₄ + H₂.
High School (9–10), General · Chemical EquationsStemPy LabStemPy Lab
Medium
8.
Balance each equation. K + O₂ → K₂O; H₂ + Br₂ → HBr; K + H₂O → KOH + H₂; Fe + O₂ → Fe₂O₃
High School (9–10), General · Chemical EquationsStemPy LabStemPy Lab
Easy
9.
Magnesium ribbon reacts with dilute hydrochloric acid: Mg + 2HCl → MgCl₂ + H₂.
High School (9–10), General · Chemical EquationsStemPy LabStemPy Lab
Medium
10.
Count the atoms of each element, and the atoms in all, in one formula unit of: ammonium carbonate…
High School (9–10), General · Chemical EquationsStemPy LabStemPy Lab
Medium
11.
Write the skeletal equation, with formulae, for each word equation.
High School (9–10), General · Chemical EquationsStemPy LabStemPy Lab
Easy
12.
Name the reactants and the products in each, and write the word equation.
High School (9–10), General · Chemical Equations, Types of Chemical ReactionsStemPy LabStemPy Lab
Easy
13.
Name the sign of a chemical reaction that you see in each case.
High School (9–10), General · Chemical Equations, Types of Chemical ReactionsStemPy LabStemPy Lab
Easy
14.
Say whether each change is physical or chemical.
High School (9–10), General · Chemical Equations, Types of Chemical ReactionsStemPy LabStemPy Lab
Easy