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2 years ago

Describe the motions of particles in the 3 common states of matter

1 answer:

3 0

3 Common States of Matter:

1. Solid - particles are motionless and stick together very closely.

2. Liquid - particles are moving slowly without pattern.

3. Gas - Particles are moving rapidly again without pattern.

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If 1 gram of calcium chloride is dissolved in 100 mL of pure water, what temperature change will be observed

svp [43]

Explanation:

It is known that the molecular weight of $CaCl_{2}$ is 111 g/mol. This means that 1 mole of $CaCl_{2}$ contains 111 g $CaCl_{2}$ .

1 g $CaCl_{2}$ = $\frac{1}{111} mol CaCl_{2}$

As we know that the density of water is 1 g/cc (as 1 ml = 1 cc).

So, 100 ml water = 100 g water. Therefore, in 100 g of water $CaCl_{2}$ present will be calculated as follows.

$\frac{1}{111}$ mol

So, in 1000 g water the amount of $CaCl_{2}$ present will be calculated as follows.

$\frac{1 \times 1000}{111 \times 100}$

= 0.09 mol

Hence, the molality of $CaCl_{2}$ is 0.09 mol.

According to Raoult's law,

$\Delta T_{b} = K_{b} \times m$

where, $K_{b}$ = boiling point constant

For pure 1 kg water, $K_{b}$ = 0.52 K.kg/mol

m = molality of solution

Therefore, putting the given values into the above formula as follows.

$\Delta T_{b} = K_{b} \times m$

= $0.52 K m^{-1} \times 0.09 m$

= 0.0468 K

Therefore, the boiling point will raise by 0.0468 K.

4 0

2 years ago

Has boiling vents in the datk door

77julia77 [94]

Marine.

Hope this helps!

-Payshence

8 0

2 years ago

A tank originally contains 100 gallons of fresh water. Then, water containing 0.5 lb of salt per gallon is poured into the tank

ValentinkaMS [17]

Answer:

The amount of salt in the tank at the end of an additional 10 minutes are 4.38lb.

Explanation:

Situation 1:

Tank with 100 gallons of fresh water

Situation 2:

Tank with 100 gallons of fresh water + water with 0.5lb of salt per gallon

After 10 minutes, as the rate in which the new water is poured is 2 gallons per minute, the result is 20 gallons added (2×10=20) . And taking in account that the water contains 0.5 lb of salt per gallon the amount of salt added is 20×0.5= 10lb of salt.

That amount of salt is now in all the water inside the tank which is 100 gallons+ 20 gallons= 120 gallons. That means that in situation 2 we have 10lb of salt in 120 gallons of water.

That mixture is allowed to leave the tank at a rate of 2 gallons per minute so we will have after 10 minutes: 120 gallons- (2×10) gallons= 100 gallons remaining in the tank. And the amount of salt if we remember that we had 10lb in 120 gallons, now in 100 gallons we will have: (100 gallons × 10lb of salt)/ 120 gallons= 8.33 lb of salt.

Situation 3:

Tank with 100 gallons of water with 8.33lb of salt.

After 10 minutes in which fresh water is poured in the tank at a rate of 9 gallons per minute, the result is: 9×10= 90 gallons added to the tank. So now we have 100+90=190 gallons of water in the tank. That means in situation 3 we have 8.33 lb of salt in 190 gallons of water.

That mixture is leaving the tank at a rate of 9 gallons per minute so we have after 10 minutes: (190- (9×10))= 100 gallons of mixture remaining in the tank.

And the amount of salt if we remember that we had 8.33lb in 190 gallons, now in 100 gallons we will have: (100 gallons × 8.33lb of salt)/ 190 gallons= 4.38 lb of salt.

7 0

2 years ago

Write any two effect of gravity

natita [175]

The Earth's gravitational force accelerates objects when they fall. It constantly pulls, and the objects constantly speed up.

8 0

2 years ago

In a metabolic pathway, succinate dehydrogenase catalyzes the conversion of succinate to fumarate. the reaction is inhibited by

Pani-rosa [81]

Competitive inhibitor

7 0

3 years ago