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Stells [14]
3 years ago
10

Which one is the catalyst?

Chemistry
1 answer:
yan [13]3 years ago
5 0

Answer:

the catalyst is the two gray dots

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What are function of lipids​
olga2289 [7]
Lipids serve as structural components of cell membranes, function as energy storehouses, and function as important signalling molecules. They include fats, waxes, oils, hormones, and certain components of membranes and function as energy-storage molecules and chemical messengers.

Hope this helped :)
6 0
2 years ago
Please help me out with these questions please..<br><br> Both are in 1 picture:)
jeka57 [31]

Answer:

1. B

2. C

Explanation: The law that the properties of the elements are periodic functions of their atomic numbers. And the second one is, most of the air we breathe is made of oxygen.

8 0
3 years ago
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One characteristic of a lagoon is often:
Alik [6]

One characteristic of a lagoon is often: concentrated salt.

4 0
4 years ago
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You draw back on the piston of a pump and the volume of air in the pump doubles. Which of the following happens?
ohaa [14]

Answer: The correct answer is Option C.

Explanation:

We are given a piston of a pump, which means that there is no loss of the air. and there is a change in pressure and volume but temperature of the system remains constant.

As, the pressure of the system increases, there will be more number of particles. So, the number of collisions per unit area will increase.

\text{Number of collisions}\propto \text{Pressure}

But in the question, volume gets doubled. So, the pressure will be determined by using Boyle's Law:

P\propto \frac{1}{V}

V_2\rightarrow 2V_1

where, V_1\text{ and }V_2 are the initial and final volume respectively.

Putting the change in volume in above equation, we get:

P_2=\frac{1}{2V_1}\\\\P_2=\frac{1}{2}P_1

where, P_1\text{ and }P_2 are the initial and final pressure respectively.

As, the pressure is reduced to half of the initial pressure. So, the number of collisions per unit area will also be reduced to one-half.

Hence, the correct answer is Option C.

5 0
3 years ago
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How do I do this if carbon has 4 valence electrons and oxygen has six valance electrons how do I do that if they only need eight
Sveta_85 [38]
The carbon will make two double bonds with the oxygen: O=C=O this way carbon will make 4 covalent bonds and oxygen will make 2 covalent bonds
4 0
3 years ago
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