Answer:
The evolution of a colourless, odourless gas
Explanation:
If the pH = 1.5, Solution G is acidic.
Sodium carbonate is a base.
It will react with an acid to form carbonic acid, which decomposes into water and carbon dioxide.
2H⁺(aq) + CO₃²⁻(aq) ⟶ H₂CO₃(aq) ⟶ H₂O(l) + CO₂(g)
They observed the evolution of bubbles of a colourless, odourless gas.
Answer:
Observation is a good thing on Maddie’s experiment because it helps you understand better.The variable is the radish seeds.
Explanation:
Hope this helps!
The correct answer is C.
Burning is a chemical change. It's a chemical process that includes oxygen.
All the other options are a change of state: form solid to liquid, or from liquid to gas (as in the last one).
Answer:
the nights are shorter
Explanation:
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