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Hoochie [10]
3 years ago
12

How did cyanobacteria change life on earth

Chemistry
1 answer:
posledela3 years ago
6 0
Cyanobacteria are photosynthetic. They convert sunlight into energy and produce oxygen as a waste product. Back then, the Earth's atmosphere didn't have free oxygen in it as it does today. ... The cyanobacteria changed that.
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The molecule CH,Cl has four atoms arranged around one central atom. What is the shape of the molecule? (1
balu736 [363]

Answer:

tetrahedral

Explanation:

it sounds like a tetrahedral shape, which is when there are four bonds and no lone pairs around the central atom in the molecule.

6 0
2 years ago
This lab question is: How can you distinguish a physical change from a chemical change?
geniusboy [140]

Answer:b,and c

Explanation:

4 0
3 years ago
Answer each of the following questions with increases, decreases, or does not change.
Nitella [24]

Answer:

a) increases

b) decreases

c) does not change

d) increases

Explanation:

The vapour pressure of a liquid is dependent on;

I) the magnitude of intermolecular forces

II) the temperature of the liquid

Hence, when any of these increases, the vapour pressure increases likewise.

Similarly, the boiling point of a liquid depends on the magnitude of intermolecular forces present because as intermolecular forces increases, more energy is required to break intermolecular bonds.

Lastly, increase in surface area of a liquid does not really affect it's vapour pressure.

7 0
3 years ago
What does the chemical formula CaCI2 show about the compound or represents?
atroni [7]

Answer:

Two elements because Can is one element and Cl is another. The two is a coeficient that states how many of that element there is.

I hope this helps you!!!

8 0
3 years ago
Silver chloride breaks down to form silver and chlorine in the presence of light. What type of reaction is this?
Vitek1552 [10]
This is the decomposition reaction, namely the reaction of photolysis.

2AgCl = 2Ag + Cl₂
7 0
3 years ago
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