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4 years ago

When an ionic compound dissolves in water, the ions are held to the water molecule due to

1 answer:

defon4 years ago

7 0

The answer to the question is the letter "C. an attractive force".

Due to this "an attractive force", an ionic compound dissolves in water, ions are held to the water molecule. This force acts between molecules and the neighboring molecules.

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Does crumpled paper and a flat sheet of paper have the same weight

shtirl [24]

Answer:

NO, THE CRUMPLED PAPER WEIGHT'S MORE THAN FLAT SHEET OF PAPER

6 0

2 years ago

Be sure to answer all parts.The equilibrium constant (Kc) for the formation of nitrosyl chloride, an orange-yellow compound, fro

miss Akunina [59]

Explanation:

Since, the given reaction is as follows.

$2NO(g) + Cl_{2} \rightleftharpoons 2NOCl$

Expression for $Q_{c}$ of this reaction is as follows.

$Q_{c} = \frac{[NOCl]^{2}}{[NO]^{2}[Cl_{2}]}$

Putting the given values into the above formula as follows.

$Q_{c} = \frac{[NOCl]^{2}}{[NO]^{2}[Cl_{2}]}$

= $\frac{(9.50)^{2}}{(4.40 \times 10^{-2})^{2} \times (1.80 \times 10^{-3})}$

= $\frac{90.25}{34.848 \times 10^{-7}}$

= $2.59 \times 10^{-7}$

Thus, we can conclude that $Q_{c}$ for the experiment is $2.59 \times 10^{-7}$ .

7 0

4 years ago

Glycerol (C3H8O3, 92.1 g/mol) is a nonvolatile nonelectrolyte substance. Consider that you have an aqueous solution that contain

pychu [463]

Answer:

The vapor pressure of the solution at 25°C is 26.01 Torr

Explanation:

This is a usual excersise of colligative properties. In this case we apply the vapor pressure lowering formula:

ΔP = Xst . P°

Where ΔP is the diferrence between Pressure of solution - Pressure of pure solvent.

And Xst the molar fraction.

P° is Pressure of pure solvent.

So the formula will be:

Pressure Solution - P° = Xst . P°

Pressure Solution - 23.8 Tor = Xst . 23.8 Torr

Xst : Mole fraction ( Moles of solute or solvent / Total moles)

34.4 % m/m means that in 100 g of solution I have 34.4 g of solute

If I have 34.4 g of solute and the mass of 100 g in solution, I can know the mass of solvent, and finally the moles.

100 g solution - 34.4 g solute = 65.6 g (mass of solvent)

Molar mass of water : 18 g/m

Moles of water: Mass of water / Molar mass

65.6 g / 18g/m = 3.64 moles

Moles of glycerol : Mass glycerol / Molar mass glycerol

34.4 g / 92.1 g/m = 0.373 moles

Total moles: moles of glycerol + moles of water

0.373 m + 3.64 m = 4.01 m

So Xst = 0.373 m / 4.01 m → 0.093

Pressure Solution - 23.8 Tor = 0.093 . 23.8 Torr

Xst HAVE NO UNITS

Pressure Solution = (0.093 . 23.8 Torr ) + 23.8 Tor

Pressure Solution = 26.01 Torr

6 0

3 years ago

. I am described as being conductive, malleable, shiny, and reactive with HCl. I am one of the most reactive elements. I turn bl

mylen [45]

Answer:

Potassium

Explanation:

Most reactive metal in the reactivity series

8 0

3 years ago

The variable n represents

Vika [28.1K]

C is the correct answer

8 0

3 years ago