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zaharov [31]
3 years ago
14

What is the molarity of a solution prepared by dissolving 2.143E 1 grams of NaCl in water to make a 1.36E 2 mL solution

Chemistry
1 answer:
Helga [31]3 years ago
3 0

Answer:

b

Explanation:

causes onj the scale of 2 3 4 it equals s

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5. You have two sealed jars of water at the same temperature. In the first jar there is a large amount of water. In the second j
Aneli [31]
The vapor pressure of the two jars are the same.

The volume of water inside the container does not change the vapor pressure.

As long as the liquid remains being water and the temperature does not change the vapor pressure will be the same. The vapor pressure depends only in the nature of the substance and the temperature of the system.
If you want to know more about this, i.e. why, here you have additional explanation:

The vapor pressure is the pressure of the vapor of a substance in equilibrium with the substance in liquid (or solid state) and it is due to the fact that some molecules in the liquid (or solid), those that are close to the surface of liquid in contact with the gas phase and that have enough kinetic energy, evaporate.

At equilibrium the number of molecules passing from the liquid state to the gas state is equal to the number of molecules that pass from the gas state to the liquid state.  If the volume of liquid is increased or decreased, as long as the temperaature of the system remains constant the equilibrium is reached again with the same vapor pressure.


5 0
3 years ago
How many moles of I2 are there in 5.34 x 1025molecules of I2 ?
JulsSmile [24]

Explanation:

pls the question is not clear to me

3 0
3 years ago
If 420 joules of heat energy is added to 25 grams of water at 25 degrees celcius, what will be the final temperature of the wate
natka813 [3]

Answer:

T2 = 29°C

Explanation:

Given data:

Heat added = 420 j

Mass of water = 25 g

Initial temperature = 25°C

Final temperature = ?

Solution;

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Specific heat capacity of water = 4.18 j/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Now we will put the values.

420 j = 25 g ×4.18 j/g.°C × (Final temperature - initial temperature)

420 j = 25 g ×4.18 j/g.°C × (T2 - 25°C)

420 j = 104.5  j/°C × (T2 - 25°C)

420 j /104.5  j/°C = T2 - 25°C

4°C + 25°C = T2

T2 = 29°C

4 0
4 years ago
Which statement accurately describes one aspect of plate tectonics that involves subduction and seafloor spreading?
mrs_skeptik [129]

Answer:

B

Explanation:

5 0
3 years ago
Read 2 more answers
What is the frequency,in Hz,of electromagnetic radiation that has a wavelength of 1.25m​
Kryger [21]

Answer:

f=2x10^8Hz

Explanation:

Hello!

In this case, given that frequency of the electromagnetic radiation showing off a wavelength of 1.25 m is computed by using the speed of light as shown below:

f=\frac{c}{\lambda }

We plug in the wavelength and speed of light to obtain:

f=\frac{3x10^8m/s}{1.25m } \\\\f=2x10^8Hz

Best regards!

5 0
3 years ago
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