Chemical Reactions and the Law of Conservation of Mass (HSC SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What are chemical reactions?
What are chemical reactions?
Permanent changes when materials mix
What does the law of conservation of mass state?
What does the law of conservation of mass state?
Matter cannot be created or destroyed
If you start with 100 g of reactants, what mass of products will form?
If you start with 100 g of reactants, what mass of products will form?
Exactly 100 g
Why must the investigation be conducted in a sealed bag?
Why must the investigation be conducted in a sealed bag?
To prevent products from escaping
What does the state symbol (aq) represent?
What does the state symbol (aq) represent?
Aqueous solution (dissolved in water)
What happens to atoms during a chemical reaction?
What happens to atoms during a chemical reaction?
They are rearranged into new combinations
What does the arrow mean in a chemical equation?
What does the arrow mean in a chemical equation?
Reacts to form or yields
Which observation indicates a chemical reaction is occurring?
Which observation indicates a chemical reaction is occurring?
Colour changes and bubbling
When balancing equations, which atoms should you start with?
When balancing equations, which atoms should you start with?
Atoms in only one place on each side
What happens if the investigation bag is not sealed?
What happens if the investigation bag is not sealed?
Gases escape, causing apparent mass loss