List the kinds of evidence that indicate that a chemical reaction has occurred.

Answers

Answer 1
Answer:

1) Temperature change

2 ) exothermic release of energy

3) Endothermic absorption of energy


I hope that's help !


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What has thermal, chemical, and electrical energy

Answers

A car uses all of these types of energy :-)

How to do the equation p1v1 = p2v2 as an equation layed out like:P1V1=P2V2
equation
answer
for the question "A sealed of gas at 101,000 Pa is expanded, reducing the volume from 0.5m3 to 0.25m3."

Answers


P1 and P2 are the pressures, and V1 and V2 are the volumes. So you take the first pressure and volume you are given and place them into the equation P1V1 so the first part of the equation would be 101000*0.5 = P2V2. You then rearrange the equation to find what you want, in this instance you would do 50500/0.25 = P2... therefore P2 = 2020000Pa or 2.02*10^6Pa

Does anyone have a software online that you can attach videos to? (School project)

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Depends onwhat you are doing, powerpoint allows you to add videos to it as well as keynote on mac. Is that what you where after?

Draw arrows to show how the forces of thrust,drag,and Gravity act on a racing car as it moves forward

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2 images attatched below
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The molecules of a substance are moving rapidly in a container. The molecules do not interact with each other. If the container is opened, the molecules will escape from the container. In what phase of matter are the molecules in the container?

Answers

Answer:

The phase of the molecule is gas.

Explanation:

Gas is one of the basic state of matter. The other fundamental states are solid and liquid. Gas have no definite shape nor size. Gases will occupy the whole space of a closed container. The properties of a gas is dependent on the volume of the container. Gases in a closed container tends to move rapidly .They move chaotically and randomly hitting the wall of the container. Gas have low density and are highly compressible. Gas moves rapidly due to the inter-molecular forces holding them is weak.

The forces holding them are weak and the molecules rarely interact they collide with each other constantly in a closed system. The molecules will escape immediately if the closed system is open because of the rapid nature of the molecules.

Answer:

Gas

Explanation:

A battery uses _________________ energy to generate _______________ energy.

Answers


Uses chemical and generates electrical
chemical and electrical.