Answer:
It demonstrates that it a physical change because you can't see nothing happening but something happening
Sry if it doesn't make sense
Answer:
mass is the measure of the amount of weight pulled by gravity in an object B-)
Answer:
20 atm / (R . 321 K . i) = M
Explanation:
Osmotic pressure is a colligative property which is determined by the solute.
Solutes over solutions, can increase the osmotic pressure which is calculated like this:
P = M . R . T
where P is pressure, M is molarity, R the Universal Constant Gases and T, the absolute Temperature. We also have to consider the Van't Hoff factor, i, numbers of ions dissolved. Ionic salts determine more osmotic pressure than organic compounds, where i = 1. Then, the complete formula is:
π = M . R . T . i
To determine molarity, osmotic pressure divide all the terms:
20 atm / (R . 321 K . i) = M
R = 0.082 L.atm/mol.K
If you see all the units in R, they will be cancelled, so finally the answer will be mol/L, which is molarity. The i term has no unit!.
energy to raise temperature is 590 J
Given:
mass of silver sample = 0.5 kg
initial temperature = 200 k
final temperature = 205 k
specific heat of silver = 236 j/kgk
To Find:
energy to raise temperature
Solution: The heat energy required to raise the temperature of of a substance through is called its specific heat capacity.
Q = cmΔt
where c= constant of proportionality, called specific heat capacity of the body
Q = mass x specific heat x ∆t
= 0.5 x 236 x ( 205-200 )
= 590 J
So, energy to raise temperature is 590 J
Learn more about Specific heat capacity here:
brainly.com/question/16559442
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