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nlexa [21]
3 years ago
11

What's a vacuum exactly

Chemistry
1 answer:
stealth61 [152]3 years ago
7 0

Answer:

Vacuum: space in which there is no matter or in which the pressure is so low that any particles in the space do not affect any processes being carried on there It is a condition well below normal atmospheric pressure and is measured in units of pressure (the pascal).-the internet gave me this answer so..

Explanation:

hope this helps :)

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Whats the mass of a 1.25L sample of liquid that has a density of 0.921g/mL?
Zarrin [17]
Hey there!

Volume in mL :

1.25 * 1000 => 1250 mL 

Density = 0.921 g/mL

Therefore:

Mass = density * volume

Mass = 0.921 * 1250

Mass = 1151.25 g 
8 0
3 years ago
The quantity of energy released or absorbed as heat during a chemical reaction is called the 28. a. temperature. c. entropy d. f
Tatiana [17]

Answer: enthalpy of reaction.

Explanation:

Temperature of the gas is defined as the degree of hotness or coldness of a body. It is expressed in units like ^0C and K

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

Free energy is the amount of energy that can be converted into useful work.

Enthalpy of the reaction is the difference between the energy of products and the energy of reactants. it is either the heat released or absorbed during the reaction. It is either positive or negative.

5 0
4 years ago
Which word describes a hypothetical gas that perfectly fits all the
loris [4]

A hypothetical gas that perfectly fits all the

assumptions of the kinetic- molecular theory is Ideal gas.

(they actually don't exist)

5 0
3 years ago
Referencing the reasoning you used from #1, explain the difference between objects that feel hot and those that
dezoksy [38]

Answer:

The temperature of the cold water is lower than the warm one. So, when we put the hand in the warm from the cold water, our hand will absorb heat, causing the hand to feel hot. Thus, we can conclude that the more heat it absorbs, the more hotter it is. Whereas the more heat it releases, the colder it is.

6 0
3 years ago
1. What will happen if a car experiences a 300 N force to the right from the engine and a separate 150 N force due to friction a
zavuch27 [327]

<u>Given:</u>

Force acting on the car moving it to the right = F1= 300 N

Force due to friction and air resistance moving it to the left = F2 = 150 N

<u>To determine:</u>

The net force on the car

<u>Explanation:</u>

Force is a vector. The force of friction acts in a direction opposite to the applied force.

If, F1 = 300N, right, then F2 = -150 N, left

Therefore, the net force acting on the car will be:

F = F1+F2 = 300 - 150 = 150 N

<u>Ans</u>: Since the force acting on the right is greater, the car will experience a net force of 150 N which will accelerate it to the right

4 0
3 years ago
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