A gas occupies 12.3 l at a pressure of 40 mm hg. what is the volume when the pressure is increased to 60 mm hg

Answers

Answer 1

Answer: From boyles law.
P1v1=P2v2
So,12.3×40=v×60
V= 12.3×40/60
8.2

Answer 2

Answer: Boyle's Law states an inverse relationship between volume and pressure. If the constant of proportionality is 12.3×40 which is 492, the volume would be 492÷60 which is 8.2.

Answer is 8.2 I

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Which of these are physical changes in matter check all that apply .

Answers

Answer:

boiling water

sharpening a pencil

freezing water

What answers are there? you didn't add them.

physical change and chemical change.

physical change affects a substance's physical properties, and a chemical change affects its chemical properties.

What is Nuclear Fission?

Answers

It's where a heavy nucleus splits on its own or upon impact. This will release energy and used in things like bombs, powerplants, etc

the main process of generating nuclear energy

The amount of energy a person can consume throughout the day without gaining weight is extremely dependent onA. hunger.
B. appetite.
C. culture.
D. activity level.

Answers

I'm quite sure it's activity level. One other thing that could've been said is metabolism, but that isn't there. However, food is consumed for the body to have energy, and without that energy we wouldn't be able to function. And when we let that intake of food settle, it's stored as fat. But because of activity level, we are capable of burning those calories.

D is the answer you are looking for.

What was henri becquerel studying when he accidentally discovered radioactivity?

Answers

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Why does it make sense that if an atom loses electrons, it is left with a pisitive charage?

Answers

Because atoms are neutral. By neutral, I mean that; there are three main particles that make up an atom. Protons, Electrons and Neutrons. Protons have (electrically) positive charge, electrons have negative and neutrons are electrically neutral. One proton's charge is +1 and one electron's charge is -1. An atom (normally) has the same amount of protons and electrons. Let's say if an atom has two protons and two electrons, the sum of electrical charges of the protons is (two times +1) +2 and sum of electrical charge of electrons is (two times -1) -2 . The total charge of the atom is the sum these. So, (-2)+(2)= 0. That makes the charge of the atom 0, thus makes it neutral. But let's say this atom loses one of its electrons, and now has only one. So one electron (-1) and two protons (+2) in total will be : (-1)+(2) = +1 . +1 is positive, so this makes the charge of the atom positive.

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c. underground mining
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Answers

Answer : Option A) Deforestation.

Explanation : Factors related to deforestation can lead to desertification in presence of natural drought.

As natural drought hit area is an area which has low amount of water supply in the land. It is also called as below average precipitation land when drought area is deforested it will lead to desertification. As the plants in the drought area are the reason why their is at least low water is found, if these vegetation is deforested then it will lose its capacity to hold water and the land will be deserted.

Answer:

The answers A

Explanation:

i just took the test

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