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Luden [163]
2 years ago
7

What is a lightning?​

Chemistry
1 answer:
pantera1 [17]2 years ago
3 0
It’s an equipment in a home , work place , many other places.
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What is the process by which molecules of water vapor in the air become liquid water?
mote1985 [20]
That is called condensation
5 0
3 years ago
The plant chemical which absorbs sunlight and helps make cell food is
UkoKoshka [18]

Answer:

chlorophyll

Explanation:

8 0
3 years ago
In general, which properties are common to elements within a single group on the periodic table?
blsea [12.9K]
Almost all properties are common to elements within a single group on the periodic table. They react with water in the same way, they have the same number of valence electrons thereby having the same valency, the number of shells in the atom of the element increases by one as we move down the group. 

In general, they have the same chemical properties as chemical properties depend on the number of electrons in the valence shell i.e. the outermost shell in the atom of an element. 
7 0
3 years ago
The effect of a catalyst on an equilibrium is to ________. Select one: a. increase the rate of the forward reaction only b. slow
Georgia [21]

Answer:

E

Explanation:

A catalyst is a substance which alters the rate of a chemical reaction. We check for the correctness of each of the options as follows:

A. Is wrong.

A catalyst can increase the rate of the forward and backward reaction

B. Is wrong

A catalyst does not slow the reverse reaction only. This particular case is the case of a negative catalyst

C is wrong

A catalyst has no effect on the equilibrium nor the equilibrium constant

D is wrong

Catalyst has no effect on equilibrium value

E is correct

Although Catalysts has no effect on equilibrium or its constant value, it can increase the the rate at which equilibrium is achieved by speeding up the reaction through bringing down the activation energy

5 0
3 years ago
10 Points! Which type of fossil is formed when a rock hardens inside a mold fossil?
irina [24]

Answer:

I'm sure it's option A. Cast Fossil

3 0
3 years ago
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