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3 years ago

Compared to the boiling point and the freezing point of water at 1 atmosphere, a 1.0 M CaCl2(aq) solution at 1 atmosphere has a

Chemistry

2 answers:

loris [4]3 years ago

6 0

Answer:

The is a higher boiling

point and lower freezing point

Explanation:

Vlada [557]3 years ago

4 0

Answer:

Higher boiling point and lower freezing point

Explanation:

Boiling point is the temperature at which substances goes to gaseous phase form their liquid phase. Liquids boil when vapour pressure of the liquid becomes equal to atmospheric pressure. So boiling point of a liquid is affected by the change in its vapour pressure and vapour pressure is affected by adding a non-volatile solute in it.

Effect of adding non -volatile solute on vapour pressure:

When a non-volatile solute is added to a liquid, it alters the interaction between the liquid particles and prevents the liquid particles to going into gaseous phase which results in decrease in vapour pressure. More energy is needed for the vapour pressure of the liquid to becomes equal to atmospheric pressure. Therefore, boiling point increases.

CaCl2 is a non-volatile solute and hence increases the boiling point of the water.

Effect of adding non-volatile solute on freezing point:

When a non-volatile solute is added to a liquid, it alters the interaction between the liquid molecules. The new solute and solvent interaction prevents the liquid to soldify and requires more lowering in temperature. Therefore, freezing point decreases.

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While washing his hands before the client consultation with Chloe, Jayden dropped some water onto the countertop. When he came b

Anastaziya [24]

Answer:

The water molecules turned into gas called "water vapor" and are now part of the air.

Explanation:

The "drops of water" are actually made up of water molecules. Under heat, they change their phase from liquid to gas. This means that the water molecules move faster. Such movement allows the molecules to escape into the atmosphere as gas. Such gaseous state of water is called "water vapor" (transparent in color).

The client consultation must have taken time that the drops of water evaporated when Jayden came back.

Aside from evaporation, water vapor may also be produced through the process called "sublimation." This happens when ice directly turns into gas without becoming a liquid.

So, this explains the answer.

3 0

3 years ago

_______are lipids that contain cholesterol

alukav5142 [94]

Answer: Fats

Explanation: Cholesterol is one of several types of fats (lipids) that play an important role in your body.

3 0

2 years ago

9th grade...Chemistry help needed

Pavel [41]

Answer:

1). Scientific

2). Plating the diluted bacteria on media that supports the growth of only living micro organisms. Statistically accurate.

7 0

2 years ago

Helium is the lightest noble gas and the second most abundant element (after hydrogen) in the universe. The mass of a helium−4 a

dmitriy555 [2]

Answer: The fraction of atom's mass contributed by nucleus is 0.99

Explanation:

Nucleons are defined as the sub-atomic particles which are present in the nucleus of an atom. Nucleons are protons and neutrons.

The isotopic symbol of Helium-4 atom is $_2^4\textrm{He}$

Number of electrons = 2

Number of protons = 2

Number of neutrons = 4 - 2 = 2

We are given:

Mass of He-4 atom = $6.64648\times 10^{-24}g$

Mass of 1 electron = $9.10939\times 10^{-28}g$

Calculating the mass contributed by the nucleus = $m_{He}-2(m_e)$

Mass of the nucleus of He-4 atom = $6.64648\times 10^{-24}-(2\times (9.10939\times 10^{-28}))=(6.64648-0.0018219)\times 10^{-24}=6.64466\times 10^{-24}$

To calculate the fraction of atom's mass contributed by the nucleus, we use the equation:

$\text{Fraction of atom's mass contributed by nucleus}=\frac{\text{Mass of nucleus}}{\text{Mass of atom}}$

Putting values in above equation, we get:

$\text{Fraction of atom's mass contributed by nucleus}=\frac{6.64466\times 10^{-24}g}{6.64648\times 10^{-24}g}=0.99$

Hence, the fraction of atom's mass contributed by nucleus is 0.99

8 0

2 years ago

Which of the following is an adaptation that helps protect the animal?

saveliy_v [14]

C ( Porcupines use there’s sharp quills to defend themselves from larger predators!)

6 0

2 years ago