Chemistry Middle School

Which of the following most likely happens during a physical change?

a) New atoms are introduced in the molecules of the substance.

b)A substance reacts differently with a chemical before and after the change.

c)An irreversible process takes place.

d)Substance changes its form but not its molecular composition.

its science-

Answers

Answer 1

Answer:

A. New atoms are introduced in the molecules of the substance.

Explanation:

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Answer 2


a) New atoms are introduced in the molecules of the substance.

Related Questions

• Explain what causes the water to move through the cycle.





• Describe why you may have traveled to the same place many times. Why would this happen in nature?




• What force brings precipitation to the ground?




• What would have to happen to water for it to evaporate?




• What would have to happen to water vapor for it to condense?




• Describe the effect of thermal energy transfer on the water cycle.

Answers

Answer:

Evaporation and gravity cause water to move through the water cycle.

Explanation:

Evaporation turns liquid water into a gas, and brings it up into the atmosphere, where the gas condenses into frozen water molecules, which stick to each other. When a clump of water molecules gets too heavy, gravity pulls them down to the surface as precipitation. Depending on the temperature, the frozen water droplets may melt, or stay frozen.

Gravity brings precipitation to the ground.

Water has to heat up from high temperature, from either the sun or another heat source, to change the form from gas to liquid.

Water vapor must get to a certain temperature of cold to freeze, causing it to condense from a gas to liquid.

Thermal energy causes evaporation of water, which allows the water to be reprecipitated once again.

All yall smarties Plz Help I will Mark you BRAINLY A student is investigating how thermal energy moves. The student heated a nail to 100°C and placed it into 250 mL of 20°C water.
Based on your experience, what will happen to the thermal energy of the water and the nail?

OThe water will transfer energy to the nail until the water and nail have an equal temperature.

O The nail will transfer energy to the water until the water and nail have an equal temperature.

O The nail will transfer energy to the water and the nail maintains its original temperature.

O The water will transfer energy to the nail and the water maintains its original temperature.

Answers

Answer: B

Explanation:i dont the explaniation but my dad is an expert in science so he told me the answer

If I’m right it should be b.

As part of an investigation, students combined substances in a beaker to observe chemical reactions. They performed two procedures. They measured the mass of each substance before and after each reaction. The table shows their observations.


Assuming the students did not make any careless errors, what likely explains these changes in mass?

A. Procedure 1: All the reactants were liquids that evaporated.
Procedure 2: A gas was formed as one product, and it escaped into the air.

B. Procedure 1: One of the reactants was converted to thermal energy.
Procedure 2: All the products were liquids.

C. Procedure 1: The reactants were liquids with different densities.
Procedure 2: The reactants were combined into only one product.

D. Procedure 1: One of the products was a gas that escaped into the air.
Procedure 2: A gas from the air reacted with one of the other reactants.

Answers

Answer: its D

Explanation: I took a test, got it correct.

Answer:

It is d

Explanation:

And why is becasue I got this gueston right on my test

The Case of the Missing Mass: Students have completed the experiment of combining vinegar and baking soda. They notice that their beginning mass in the video does not match the ending one. Use the equation(below) and the Law of Conservation of Mass to explain why the students have NOT destroyed atoms in their experiment. This is the chemical equation for the experiment:

Answers

Answer:.

Explanation:

HOW FAST CAN YOU ANSWER

Answers

Answer:

B.

Explanation:

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