Asked by Beatrice

1. Which gas is a source of natural groundwater pollution?
A. Carbon
B. Oxygen
C. Hydrogen
D. Radon
d?

2. A stream channel is formed when water
A. carves a very deep and wide channel into rock.
B. carries minerals into the ocean.
C. creates a depression, which forms a lake.
D. carves a narrow path into rock.
D?

3. How many chemical reactions are possible regarding the formation of carbonic acid and the dissolving of calcite?
A. 3
B. 10
C. 23
D. 2
a?
Answered by bobpursley
right, right, and look it up, I think it is two.
Answered by Beatrice
I tried two but its not the correct answer. Could you help me find the right one?
Answered by hayes
3. How many chemical reactions are possible regarding the formation of carbonic acid and the dissolving of calcite?

A. 3

This is the correct answer. I'm 100 % sure.
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