Answer:
B. 65
Explanation:
arrange your numbers as:
63,64,66,69
add 64 and 66 together to get 130 then divide by 2
-or just think about what number is between 64 and 66
Answer:
H
Explanation:
try not to put your hands on him
Explanation:
Lime is added to lower the acidity of lakes when pH levels go too low.
Acidic environment is harmful to aquatic ecosystems. Acidity causes some minerals, such as phosphorus and calcium, in the water to become unavailable to aquatic organisms like plants and fishes ( This means the water hardness is reduced). The low nutrients cause stress and death in the aquatic environment lowering biodiversity. Applying lime raises the pH to neutral levels and improves the health of the aquatic life in the lake. This also improves economic activities in the lake like fishing.
Learn More:
For more on acidicity of lakes check out;
brainly.com/question/3612253
brainly.com/question/3612253
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Answer: option A
Explanation: Organic chemistry deals with the study of carbon and hydrogen containing compounds, drugs and pharmaceuticals etc.