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3 years ago

What is te SI unit of time?

Chemistry

2 answers:

White raven [17]3 years ago

5 0

Answer:

second

Explanation:

the gap between any two intervals is called time

time can be measured in hour,minute,second

but second is the SI unit of time

bogdanovich [222]3 years ago

3 0

Answer:

second (S) is the SI unit of time.

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givi [52]

Answer:

Is there a picture or smth?

Explanation:

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2 years ago

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3 years ago

What is the osmotic pressure of a solution made from 22.3 g of methanol (MM = 32.04 g/mol) that was added to water to make 321 m

xxMikexx [17]

Answer: The osmotic pressure of a solution is 53.05 atm

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iMRT$

Or,

$\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT$

where,

$\pi$ = osmotic pressure of the solution = ?

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (methanol) = 22.3 g

Volume of solution = 321 mL

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

T = temperature of the solution = $25^oC=[273+25]=298K$

Putting values in above equation, we get:

$\pi=1\times \frac{22.3\times 1000}{32.04\times 321}\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 298K$

$\pi=53.05atm$

Hence, the osmotic pressure of a solution is 53.05 atm

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2 years ago

When the energy is removed what will happen to a gas?

creativ13 [48]

Answer:

Hey mate 
I hope it helps

Explanation:

<h3>Removing Energy: Removing energy will cause the particles in a liquid to begin locking into place. A. Boiling and Evaporation: Evaporation is the change of a substance from a liquid to a gas. Boiling is the change of a liquid to a vapor, or gas, throughout the liquid.</h3>

<h2>PLZ MARK ME AS BRAIN LIST </h2>

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2 years ago

Read 2 more answers

Which statement describes how atomic masses are arranged on the periodic table? A. Atomic masses typically increase from right t

GenaCL600 [577]

Answer:

Explanatio(3) Atomic masses are a weighted average of the naturally occurring isotopes.

(3) Atomic masses are a weighted average of the naturally occurring isotopes. is the best statement for why most atomic masses on the Periodic Table are decimal numbers.

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2 years ago