CHEMISTRY HIGH SCHOOL

The nitrogenous bases cytosine and thymine area. purines.
b. a phosphate group.
c. a sugar group.
d. pyrimidines.

Answers

Answer 1
Answer: Purines are adenine and guanine. So the answer should be D (Pyrimidines). besides, phosphate group and pentose sugar are a part of a nucleotide.

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Increasing the ? of a solvent increases the solubility of the solute

Answers

There are a lot of ways to increase the solubility of the solute. Increasing the temperature, mixing time and surface area of a solvent increases the solubility of the solute

The answer is temperature

A scientist thinks that ducks swim faster when they are in cold water. He tests two groups of ducks, one in cold water and one in room temperature water. He records how fast they swim.Experimental Group:


Control Group:

Answers

Experimental group is the ducks in cold water
And the control group is the ducks in room temperature water

Final answer:

In the experiment, the Experimental Group represents ducks in cold water, while the Control Group represents ducks in room temperature water. The scientist is testing whether water temperature affects duck swimming speed.

Explanation:

In the experiment described, the scientist is exploring whether the temperature of the water affects the speed of swimming of ducks. The Experimental Group in this scenario represents the ducks that are swimming in cold water. The scientist expects that these ducks will swim faster, based on the original hypothesis. On the other hand, the Control Group represents the ducks that are swimming in room temperature water. This group serves a basis for comparison to help the scientist determine what changes (if any) occur when the variable (water temperature) is altered.

Learn more about Scientific Experiment here:

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The orbits of the planets in our solar system arenot
a Elliptical, circular
b Circular, elliptical
C Circular, oval
d None of the above

Answers

Answer:

A

Explanation:

I don't know how to say how I got it.

Answer:

d

Explanation:

the orbits of the planets in our circular elliptical and circular

Why does the heat capacity decreases as atomic mass increases?

Answers

The general trend for a substance's heat capacity and atomic mass is that they are inversely proportional. This is because denser or larger atoms have particles that are closer to each other. The close proximity of these particles make it easier to transfer heat because of their increased vibration, making the heat capacity required smaller. 

What is the total number of carbon atoms in a molecule of ethanoic acid?(1) 1 (3) 3
(2) 2 (4) 4

Answers

There are 2 carbon atoms in ethanoic acid. Other name of such substance is acetic acid. It is a colorless liquid carboxylic acid with the chemical formula CH3COOH. It has antibacterial and antifungal properties.

Which of the following would NOT be a physical property of matter?malleability


boiling point


color


reactivity

________________________________________________________

If a substance cannot be separated physically or chemically, it is __________.


a compound


an element


a solution


a mixture

___________________________________________________________________

If a substance cannot be separated physically, it is __________.

Question 6 options:


a pure substance


heterogeneous


a mixture


an alloy

___________________________________________________________________

How would you classify tap water?


Question 8 options:


a pure substance



a homogeneous mixture



a compound



a heterogeneous mixture

___________________________________________________________________

When sugar and water are mixed they make a solution. Another way to say a solution would be to call it a __________________.


pure substance



homogeneous mixture



compound



heterogeneous mixture

Answers

reactivity

solution

mixture

homogeneous mixture

homogeneous mixture


i think the fourth one might be wrong sorry );

Which of the following would NOT be a physical property of matter?

reactivity

________________________________________________________

If a substance cannot be separated physically or chemically, it is __________.

an element

___________________________________________________________________

If a substance cannot be separated physically, it is __________.

an alloy

___________________________________________________________________

How would you classify tap water?


a compound

___________________________________________________________________

When sugar and water are mixed they make a solution. Another way to say a solution would be to call it a __________________.


compound  
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