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VikaD [51]
3 years ago
14

The physical and chemical properties of a substance are used to identify the substance and to

Chemistry
1 answer:
Dvinal [7]3 years ago
8 0

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The correct option would be A. same group.

They have similar chemical properties as they would have the same number of electrons in their outer shells.

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(b)
pentagon [3]

8%

Explanation:

In a DNA molecule the no. of Adenine bases equal to that of Thymine bases

The no. of Cytosine bases equal to that of Guamine bases.

If we take no. of Thymine bases as x and no. of Cytosine bases as y,

Adenine + Thymine + Cytosine + Guamine = 100

x + x + y+y = 100

2( x+y) = 100

x+y = 50

y=42

therefore x= 50-42 = 8%

4 0
2 years ago
If temperature is increased , the number of collision per second
Tomtit [17]

Answer: increases

Explanation:

Increase in the temperature of a reaction system will cause the molecules of the reactants to possess higher kinetic energy which they would use to travel more randomly in the system, colliding more frequently with other excited molecules and with the wall of the containing vessel.

Thus, if temperature is increased, the number of collision per second also increases.

8 0
3 years ago
What is the difference between acute and chronic radiation poisoning
otez555 [7]
Acute: Can be repaired by the body using white blood cells.

Chronic: High doses causing internal bleeding and breakdown of cells causing slow death, 90% of the times cannot be fixed by any medicines.
4 0
4 years ago
When zinc or aluminum was allowed to react with the copper sulfate , what was the limiting reagen?
musickatia [10]
Usually it is the CuSO4 that is the limiting reagent. 

<span>if all of the color of the solution was gone, but there was still some zinc metal mixed in with the copper metal produced, then Zn is the excess reagent </span>

<span>f all of the color of the solution was not gone, but there was no zinc metal left in with the blue copper solution , then Zn is the limiting reagent Hope this helps.</span>
5 0
4 years ago
Genetics and reproduction
Zepler [3.9K]

genetics and reproduction is all about dna.

7 0
3 years ago
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