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Studentka2010 [4]
3 years ago
5

Molarity is defined as the 1. moles of solute per kilogram of solvent 2. moles of solute per liter of solution 3. mass of a solu

tion 4. volume of a solvent
Chemistry
2 answers:
Luba_88 [7]3 years ago
6 0
2. the moles of solute per litre of solution.
Softa [21]3 years ago
6 0

Answer:

1. Moles of solute per kilogram of solvent

Explanation:

Molality is the number of moles of solute per kilogram of solvent.

Molality (M) = moles of solute/ kilogram of solvent

S.I unit of molality (M) = mol / kg

It is usually used in calculating colligative properties of matter.

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a closed flask of air (0.250 L) contains 5.00 "puffs" of particles. The pressure probe on the flask reads 93 kPa. A student uses
Sergio039 [100]

Answer: New pressure inside the flask would be 148.8 kPa.

Explanation: The combined gas law equation is given by:

PV=nRT

As the flask is a closed flask, so the volume remains constant. Temperature is constant also.

So, the relation between pressure and number of moles becomes

P=n\\or\\\frac{P}{n}=constant

\frac{P_1}{n_1}=\frac{P_2}{n_2}

  • Initial conditions:

P_1=93kPa\\n_1=5\text{ puffs}

  • Final conditions: When additional 3 puffs of air is added

P_2=?kPa\\n_2=8\text{ puffs}

Putting the values, in above equation, we get

\frac{93}{5}=\frac{P_2}{8}\\P_2=148.8kPa

3 0
3 years ago
Why do bicycles use gears
iren2701 [21]
It is for safety if you come to a sudden stop like newtons law say if an object is in motion it stays in motion until a force stops it if the bike suddenly stopped then you would fly off because you wold still be going. and the gear helps protect you. 
7 0
3 years ago
A gas has a volume of 340.0 mL at 45.90 oC. What is the new temperature of the gas, in Kelvin, if the volume increased to 550.0
d1i1m1o1n [39]

Answer:

Solution for A gas has a volume of 340.0 mL at 45.90 degree celsius. What is the new temperature of the gas, in kelvin, if the volume increased to 550.0 mL.

Missing: oC. ‎| Must include: oC.

Explanation:

6 0
3 years ago
The compound whose molecules have the highest average kinetic energy is?
KIM [24]

Answer:

C)

Explanation:

The warmer the molecules, the higher the average kinetic energy.

"As stated in the kinetic-molecular theory, the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles. This is registered as an increase in the temperature of the substance." -lumen learning

(I know for sure but what think... hope this helped)  

3 0
3 years ago
Convert 500 inches to m. <br> 1000mm =1m<br> 1inch = 2.54 cm <br> 10mm=1cm
stira [4]

Answer:

12.7m

Explanation:

FORMULA  

for an approximate result, divide the length value by 39.370078

3 0
3 years ago
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