CHEMISTRY HIGH SCHOOL

Mrs. Rushing has 3 chemistry classes with 24 students in each. An experiment calls for each student to use 4 test tubes. How many test tubes are needed in all for her classes?A.) 32 test tubes
B.) 96 test tubes
C.) 288 test tubes
D.) 384 test tubes

Answers

Answer 1
Answer:

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the correct option is option C.

What is matter?

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter.

Total students= number of  chemistry classes× number of students

                       =3 × 24

                       =72

Each student requires 4 test tubes.

72 ×4 = 288 test tubes.

Therefore, the correct option is option C.

To learn more about matter, here:

brainly.com/question/4562319

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Answer 2
Answer: If they have 3 chemistry classes with 24 students, than there are 72 students in total. Each student requires 4 test tubes. 72 * 4 = 288 test tubes. Our answer is C.) 288 test tubes

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HELP ME PLEASE ILL GIVE EC AND BRAINLESTPhotosynthesisMatter and Energy
Claim-Evidence-Reasoning
Name:
Date:
Scenario
Below is the equation of photosynthesis. Photosynthesis is a process that takes place in plants.
Notice that CO, and water are converted into sugar and oxygen.
External Data
600,
6 H,0
Water
light Cº,
+
602
+
Oxygen
ton Dede
Sugar
Prompt:
When you go home Dnight, your mother asks you to explain to her what happens during the
process of photosynthesis. Your mother is a science teacher, so make sure you use scientific terms
to give her a scienífic explanation of how energy is stored as sugar in plants through
photosynthesis.
I
Claim:
Evidence:
Reasoning:
Rebuttal:

Answers

Answer:

photosynthesis happens when spring is happening because of the pollen and soil

Explanation:

Which can be determined using a chemical formula?a. the elements that make up the compound
b. the substances that make up a solution
c. the pH of a solution
d. the boiling point of a compound

Answers

A chemical formula can be directly used to find out the elements that make up the compound. Also, since each chemical compound has a unique boiling point, that can also be determined by just knowing the chemical formula. The answers are:

a. the elements that make up the compound
d. the boiling point of a compound

Answer: a. the elements that make up the compound

Explanation:

Chemical formulas are the symbolic representation of the elements contained in a compound along with their relative proportions.

For example: The chemical formula for water is H_2o which shows that it is formed by combination of hydrogen and oxygen in the ratio of 2: 1 respectively.

pH of the solution is determined by litmus paper, pH paper or pH meter.

Boiling point is the temperature at which atmospheric pressure becomes equal to the atmospheric pressure.

Is friction better on a hard or smooth surface?

Answers

Answer:

Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.

Explanation:

Answer:

Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them.

Explanation:

The vapor pressure of a liquid is 0.92 atm at 60°C. The normal boiling point of the liquid could be(1) 35°C (3) 55°C(2) 45°C (4) 65°C

Answers

The answer is (4) 65°C. For this question, you need to know that the definition of boiling is when a liquid's vapor pressure equals atmospheric pressure. Normal boiling point just means boiling point at sea level, when atmospheric pressure is 1atm. For this particular liquid, you would need to raise the temperature a little for the vapor pressure to rise to 1atm (because vapor pressure increases with temperature). Therefore your temperature must be higher than 60°C, and the only such choice available to you is (4).

Answer:

  • 4 ¥

TRUST REASON

The answer is 4 because when the vapor pressure is in liquid form, the boiling point would be the hottest point

Use the periodic table to identify the element represented by each of the following electron configurations. [He]2s2: ?

Answers

Answer:

Be. Beryllium

Explanation:

Chemical A and Chemical B react in an exothermic reaction. What can be known about what will happen when Chemical A and Chemical B are mixed together?The new substance will need more energy to form its chemical bonds than the old substance will release.
More energy will be released from the old substance than the new substance will need to form its chemical bonds.
The color will change as a result of the reaction.
The substance will bubble as a result of the reaction.

Answers

More energy will be released from the old substance than the new substance will need to form its chemical bonds.

Answer:

B

Explanation:

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