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4 years ago

In order for a solute to dissolve in a solvent, what must be true?

Chemistry

1 answer:

Alex Ar [27]4 years ago

6 0

The solute has to be hydrophilic, (water loving).

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4. Calculate the concentration of NaCl in a solution prepared by diluting 2 mL of 0.05 M NaCl to a total volume of 10 mL with de

Shalnov [3]

Answer:

Molarity of NaCl = Molarity of sodium ions = Molarity of chloride ions = 0.01 M

Explanation:

Considering

$Molarity_{diluted\ solution}\times Volume_{diluted\ solution}=Molarity_{stock\ solution}\times Volume_{stock\ solution}$

Given that:

$Molarity_{diluted\ solution}=?$

$Volume_{diluted\ solution}=10\ mL$

$Volume_{stock\ solution}=2\ mL$

$Molarity_{stock\ solution}=0.05\ M$

So,

$Molarity_{diluted\ solution}\times 10\ mL=0.05\ M\times 2\ mL$

$Molarity_{diluted\ solution}=0.01\ M$

<u>Molarity of NaCl = Molarity of sodium ions = Molarity of chloride ions = 0.01 M</u>

4 0

4 years ago

Heart, 5 stars, and Brainiest to first right answer!

Serga [27]

Answer:

Thermosphere

Explanation:

More specifically the ionosphere, since the ionosphere is the lower part of the thermosphere.

Hope this helps!

4 0

3 years ago

Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system,

galina1969 [7]

Answer:

The options are

A.Surroundings get colder and the system decreases in volume.

B.Surroundings get hotter and the system expands in volume.

C.Surroundings get hotter and the system decreases in volume.

D.Surroundings get hotter and the system does not change in volume.

From the Most energy released to the most absorbed , the order is

B. Surroundings get hotter and the system expands in volume.

D. Surroundings get hotter and the system does not change in volume.

C. Surroundings get hotter and the system decreases in volume.

A. Surroundings get colder and the system decreases in volume.

6 0

4 years ago

What is the standard metric unit of volume?

klio [65]

I think its cubic meters....

7 0

3 years ago

Now that you have exercised, walked your

ASHA 777 [7]

Answer: The moles of melatonin are 0.000043

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

Given mass of melatonin = 0.01 g

Molar mass of melatonin $(C_{13}H_{16}N_2O_2)$ = 232.28 g/mol

$\text{Number of moles of melatonin}=\frac{0.01 g}{232.28g/mol}=0.000043mol$

Thus the moles of melatonin in 0.01 g are 0.000043

4 0

3 years ago