What is the molar mass for LiCl (in g/mol)

At 27°C, 2.40g of a certain gas occupies a volume of 9.84 L at a pressure of 172 torr. Calculate the molar mass of the gas.

jeyben [28]

Answer:

Explanation:

This is the answer it all done in order i hope this helps tell em if u dont understnad it

7 0

3 years ago

Why don't polar molecules and nonpolar molecules mix?

Bad White [126]

Solution:

By the following ways the polar molecule doesn’t mix with non-polar molecule

Polar molecules have a portion of their molecule which, relative to the rest of the molecule, is more negative.

Water, for example, has a bent, or V-shape, due to the 2 lone electron pairs on oxygen. This makes the oxygen end more negative than the hydrogen end. This negative area allows for hydrogen bonding between that molecule and other molecules which are also polar.

Non-polar molecules don't have a portion of the molecule which is more negative than the rest. An example of this is a hydrocarbon, like butane. Because there is no relatively negative region to the molecule, it cannot partake in hydrogen bonding and therefore does not mix with polar molecules.

Thus we can conclude that Polar mixes with polar; non-polar mixes with non-polar.

3 0

4 years ago

A liter of the gas mixture at equilibrium contains 0.0045 mol of N2O4 and 0.030 mol of NO2 at 10C. Write the expression for the

Alona [7]

Answer:

Keq = [NO₂]²/[N₂O₄] = 0.2.

Explanation:

For the gas mixture equilibrium:

N₂O₄ ⇄ 2NO₂

The expression of the equilibrium constant (Keq):

Keq = [NO₂]²/[N₂O₄]

∴ Keq = [NO₂]²/[N₂O₄] = (0.03)²/(0.0045) = 0.2.

7 0

4 years ago

A chemist dissolves 398. Mg of pure hydrochloric acid in enough water to make up 210. ML of solution. Calculate the pH of the so

Setler [38]

Answer:

THE pH OF THE SOLUTION IS 1.28

Explanation:

Step 1: Calculate the mass concentration of HCl

398 mg in 210 mL

1 L = 10^3 mL

1 g = 10^3 mg

398 *10^-3 g in 210 *10^-3 L

398 *10^-3 in 0.210 L

mass concentration = (0.398 * 1/ 0.210) g/dm3

= 1.895 g/dm3

Step 2: calculate the molar concentration

Molar mass of HCl = ( 1 + 35.5) = 36.5 g/mol

Molar concentration = mass concentration / RMM

Molar conc. = 1.895 / 36.5

Molar conc. = 0.0519 mol/dm3

So therefore, the molar concentartion of the solution is equal to the concentration of HCl.

In other words, [HCl] = 0.0519 mol/dm3

This shows that at 1 L of this solution contains 0.0519 moles of HCl

Step 3: write the dissiociation equation of HCl in water

HCl(aq) + H2O(l) --------> H30^+ (aq) + Cl- (aq)

Since HCl is a strong acid, it will dissociate completely in water forming the above products.

So we can say that:

[H3O+] = [HCl] = 0.0519 moles/ dm3

Step 4: calculate the pH

pH = -log[H3O+]

pH = -log (0.0519)

pH = 1.28(3 significant decimal place)

The pH of the solution is 1.28

6 0

3 years ago

Does the shape of molecule matter?

Lelechka [254]

Yes because it helps determine the properties the molecule has.

6 0

3 years ago