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?
right, right, and look it up, I think it is two.
I tried two but its not the correct answer. Could you help me find the right one?
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.
1. The gas that is a source of natural groundwater pollution is D. Radon.
To arrive at this answer, we need to understand that natural groundwater pollution can occur when certain substances contaminate the water that is stored beneath the Earth's surface. Radon is a radioactive gas that is produced naturally by the breakdown of uranium in rocks and soil. It can seep into groundwater and contaminate it, making it a source of natural groundwater pollution.
2. A stream channel is formed when water carves a narrow path into rock, so the correct answer is D.
To determine this, we should know that stream channels are created by the erosive action of flowing water. As water moves downstream, it cuts into the surrounding rock or soil, creating a channel or pathway for the water to flow. This process typically results in the formation of a narrow path, which is known as a stream channel.
3. The number of possible chemical reactions regarding the formation of carbonic acid and the dissolving of calcite is D. 2.
To find the answer, we can analyze the reaction between carbonic acid (H2CO3) and calcite (CaCO3). The reaction results in the formation of calcium ions (Ca2+) and bicarbonate ions (HCO3-). The balanced equation for this reaction is:
CaCO3 + H2CO3 → Ca2+ + 2HCO3-
Therefore, there are two chemical reactions involved: the dissolution of calcite and the formation of calcium and bicarbonate ions.