CHEMISTRY HIGH SCHOOL

Sexual reproduction A. helped maintain a slow rate of evolutionary change.
B. limited the material in which natural selection can act upon.
C. increased genetic variation.
D. maintained the same gene combinations over time.

Answers

Answer 1
Answer: The answer is C sexual reproduction increases genetic variation
Answer 2
Answer: Sexual reproduction increased genetic variation.

C. increased genetic variation.

~Evie

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A gas is heated from 298 K to 367 K while its volume changes from 2.5 L to 3.9 L. If the initial pressure of the gas is 1.1 atm, what is the final pressure of the gas?

Answers

PV=nRT, .85atm
If the volume goes up, the pressure goes down.

Answer:

0.87

Explanation:

Water pollution that washes into storm sewers from many places, such as parking lots and lawns, is known as nonpoint-source pollution. True or false ?

Answers

The statement that is given from above “Water pollution that washes into storm sewers from many places, such as parking lots and lawns, is known as nonpoint-source pollution” is true. This is difficult to treat as the source may come from different points.

Compare the hydronium ion concentration of the solution having a pH of 2.0 to the hydronium ion concentration of the other solution given to the student.

Answers

pH is a scale used to measure the acidity or alkalinity of an aqueous solution. It can be used to calculate the amount of hydronium ions in the solution. It is expressed as the negative logarithm to the base 10 of the concentration.

pH = -log [H+]

2.0 = -log [H+]

[H+] = 0.01 M

The formula for one molecule of sucrose is shown below.C12H22011
How many atoms in all are in one molecule of sucrose?

Answers

Answer:

45

Explanation:

There are 12 Carbons

There are 22 Hydrogens

There are 11 Oxygens.

I think the answer is either 0 or 45. But the wording is very sloppy. It is not really atoms that are present. There are ions.

Go with 45 but hold your nose when writing your answer.

What type of change goes on inside when a glow stick is activated?Chemical
Physical
Both

Answers

Answer:

Chemical

Explanation:
chemical that’s your answer boy

Acid rain is caused by human activity. true or false?

Answers

Explanation:

Acid rain is caused due to increase in nitrogen oxide and sulfur oxide into the atmosphere.

The amount of these oxides increases into the atmosphere due to increase in pollution.

Therefore, pollution is caused by humans. For example, pollution from sources like vehicles, industries, factories, labs etc leads to increase in the development of harmful gases.

Thus, the statement acid rain is caused by human activity is true.
Acid rain is cause by human activity and pollution, therefore, this is true. 
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