Question

1: If you bring a burning splint / match stick near the place where there is _________ gas, the splint would turn off because it doesn’t support ___________
2: When you blow into a mixture of calcium hydroxide (lime) and water, a ____________ is formed.
When a hydroxide combines with an acid, it leads to a ________________ reaction
3: During a chemical reaction no atoms are ____________ or lost, but they are only rearranged.
4: The ___________ of a substance does not change during a chemical reaction, instead it stays the same.
5: When a metal reacts with an acid, a gas is given off. If the container / beaker is not covered, there is a significant change in ___________​

Answer 1

Answer:

1. hydrogen

2. calcium carbonate( CaCO3)

3. created

4. mass

Mark me the brainliest ✨⭐

Answer 2

Answer:

1. carbon dioxide

. oxygen to fire

2 calcium carbonate---- exothermic reaction

3. gain

4 mass

5. gas-hydrogen