Balanced equations and masses (AQA GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does a balanced equation show in a chemical reaction?
What does a balanced equation show in a chemical reaction?
Atoms are rearranged into new substances
According to the law of conservation of mass, what happens to total mass in a reaction?
According to the law of conservation of mass, what happens to total mass in a reaction?
It stays the same
In a chemical reaction, what is the relationship between reactant and product masses?
In a chemical reaction, what is the relationship between reactant and product masses?
Masses are equal
What is the first step to calculate relative formula mass ()?
What is the first step to calculate relative formula mass ()?
Look up relative atomic mass
What is the of HCl? (H = 1, Cl = 35.5)
What is the of HCl? (H = 1, Cl = 35.5)
36.5
For CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂, what is the ratio of CaCO₃ to CO₂?
For CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂, what is the ratio of CaCO₃ to CO₂?
1:1
If 100g CaCO₃ makes 44g CO₂, how much CO₂ is produced from 50g CaCO₃?
If 100g CaCO₃ makes 44g CO₂, how much CO₂ is produced from 50g CaCO₃?
22g
Why does mass sometimes appear to decrease in a reaction?
Why does mass sometimes appear to decrease in a reaction?
A gas product escapes
When CO₂ gas bubbles away, what happens to the atoms?
When CO₂ gas bubbles away, what happens to the atoms?
They leave the container
What must you always check before doing mass calculations?
What must you always check before doing mass calculations?
Equation is balanced