Answer:
1. use a ruler to measure how many heights the ball falls down.
2. use notes to record observations.
Answer:
Matching the reaction on the top with the corresponding reaction on the left:
Explanation:
A) 2Na(s) + 2H2O(l) = 2NaOH(aq) + H2(g)
is Electrolysis breaks down water to form hydrogen and oxygen gas
B) 2H2(g) + O2(g) = 2H2O(g)
is
A bright light is produced when magnesium reacts with the oxygen in air to form magnesium oxide
Particles move further apart in gas
Answer:
It does not matter where the sample of water came from or how it was prepared. Its composition, like that of every other compound, is fixed.
Answer:
D.
Explanation:
chemical erosion is where the composition of a rock changes.
