(04.03 LC)

Choose the atom or ion that is larger.<br><br> Select one:<br> a. S<br> b. S-2

Marina CMI [18]

Answer:

In general, anions are larger than the corresponding neutral atom, since adding electrons increases the number of electron-electron repulsion interactions that take place. Cations are smaller than the corresponding neutral atoms, since the valence electrons, which are furthest away from the nucleus, are lost.

Explanation:

8 0

2 years ago

A student dissolves 15.g of styrene in 250.mL of a solvent with a density of 0.88g/mL. The student notices that the volume of th

matrenka [14]

<u>Answer:</u> The molarity and molality of styrene solution is 0.58 M and 0.66 m respectively

<u>Explanation:</u>

To calculate the mass of solvent, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of solvent = 0.88 g/mL

Volume of solvent = 250. mL

Putting values in above equation, we get:

$0.88g/mL=\frac{\text{Mass of solvent}}{250mL}\\\\\text{Mass of solvent}=(0.88g/mL\times 250mL)=220g$

<u>Calculating the molarity of solution:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

Given mass of styrene = 15. g

Molar mass of styrene = 104.15 g/mol

Volume of solution (solvent) = 250. mL

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{15\times 1000}{104.15\times 250}\\\\\text{Molarity of solution}=0.576M=0.58M$

<u>Calculating the molality of solution:</u>

To calculate the molality of solution, we use the equation:

$Molality=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ in grams}}$

Where,

$m_{solute}$ = Given mass of solute (styrene) = 15 g

$M_{solute}$ = Molar mass of solute (styrene) = 104.15 g/mol

$W_{solvent}$ = Mass of solvent = 220 g

Putting values in above equation, we get:

$\text{Molality of styrene solution}=\frac{15\times 1000}{104.15\times 220}\\\\\text{Molality of styrene solution}=0.655m=0.66m$

Hence, the molarity and molality of styrene solution is 0.58 M and 0.66 m respectively.

3 0

3 years ago

Which type of precipitation is most likely to form during a thunderstorm A sleet

Arte-miy333 [17]

Answer:

Explanation:

<h3><u>Large updrafts of air can throw rain droplets high up into the tops of the cloud.</u></h3>

4 0

3 years ago

Read 2 more answers

different energy sources can be used to generate electricity which of the following use a renewable energy resource to generate

zhannawk [14.2K]

Answer:

Ths is question uncompleted!

5 0

3 years ago

Matthias wants to dissolve a solid sample of calcium chloride (cacl2), which is an ionic compound. Which solvent will dissolve t

miv72 [106K]

Answer:

The answer to your question is: water, polar solvent.

Explanation:

Data

sample of CaCl2

Solid copper this option is incorrect because in order to dissolve something the solvent must be liquid and this is a solid solvent.

water, I think this option is right, because CaCl2 is ionic and water is a polar solvent, CaCl2 will dissolve in water.

a polar solvent, CaCl2 will dissolve is a polar solvent like water, this option is correct.

hexane, CaCl2 will not dissolve in hexane because hexane is a non polar solvent and CaCl2 is ionic. This option is wrong

a nonpolar solvent This option is not right, CaCl2 will only dissolve in polar solvents.

liquid mercury, This option is wrong, mercury is not a solvent.

6 0

3 years ago