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3 years ago

I NEED HELP PLEASE, THANKS!

Chemistry

1 answer:

baherus [9]3 years ago

3 0

Answer:

Solids have a definite shape and volume. Liquids have a definite volume, but take the shape of the container. Gases have no definite shape or volume.

Explanation:

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Determine the freezing point depression of 2 kg of water when 2 mol salt is added to it. The kf of water is 1.86 degrees C/M. Sh

Svet_ta [14]

Answer: The freezing point depression is $1.86^0C$

Explanation:

Depression in freezing point is given by:

$\Delta T_f=K_f\times m$

$\Delta T_f$ = Depression in freezing point

$K_f$ = freezing point constant = $1.86^0C/m$

m= molality = $\frac{\text {moles of solute}}{\text {mass of solvent in kg}}=\frac{2mol}{2kg}=1m$

$\Delta T_f=1.86mol/kg^0C\times 1m$

$\Delta T_f=1.86^0C$

Thus freezing point depression is $1.86^0C$

3 0

3 years ago

Which of the following is true of gases?

aniked [119]

Answer:

Answer: A. Gases are easily compressed because of the low density.

Explanation:

8 0

3 years ago

Read 2 more answers

Directions are in the picture

LuckyWell [14K]

Answer:

Explanation:

The time it takes for half of the radioactive atoms to decay to a stable state.

Hope this helped!

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3 years ago

Um cilindro de êmbolo contém certa quantidade de um gas nobre a 27°C, o qual exerce pressão de 1,5 atm e ocupa volume de 6 litro

OverLord2011 [107]

Answer:

45c

Explanation:

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3 years ago

Alkali metals are found in many common substances but are rarely found in pure form. Explain why this is in the case

Evgesh-ka [11]

Alkali metals are rarely found in pure form because they are so reactive.

Alkali metals are in Group 1 of the Periodic Table.

They need to lose only one valence electron to reach a filled valence shell

Thus, they readily react wirh water and other chemicals in the earth to form compounds.

6 0

3 years ago