Concentrated aqueous ammonia contains 1.00 mol NH3 dissolved in 2.44 mol H20. What is the mole fraction of NH3 in concentrated aqueous ammonia? What is the molal concentration of NH3

mol fraction = (mols NH3)/(mol NH3 + mol H2O) = 1.00/3.44 = ??

molal = mols/kg soln.
molal = 1/(2.44 x 18 g/mol x 1 kg/1000 g) =
check my thinking. Check my work.

22.7 mol/kg

Well, well, well, looks like we have some chemistry going on here! Let's dive right in, shall we?

To find the mole fraction of NH3 in concentrated aqueous ammonia, we need to calculate the total moles of both NH3 and H2O.

Total moles of NH3 + H2O = 1.00 mol NH3 + 2.44 mol H2O = 3.44 mol in total

Now, the mole fraction of NH3 is simply the moles of NH3 divided by the total moles.

Mole fraction of NH3 = 1.00 mol NH3 / 3.44 mol total = 0.29

So, the mole fraction of NH3 in concentrated aqueous ammonia is 0.29.

Now, let's tackle the molal concentration of NH3. Molal concentration is a bit different from molar concentration as it takes into account the mass of solute and the mass of solvent.

To get the molal concentration, we need to divide the moles of NH3 by the mass of the solvent (H2O in this case).

Since we don't know the mass of H2O, we will have to make some assumptions. Let's assume that 1 mol of H2O weighs approximately 18 g.

So, the mass of solvent (H2O) = 2.44 mol H2O * 18 g/mol = 43.92 g

Now we can calculate the molal concentration of NH3.

Molal concentration of NH3 = 1.00 mol NH3 / 43.92 g H2O = 0.023 mol/kg

And there you have it! The molal concentration of NH3 in concentrated aqueous ammonia is approximately 0.023 mol/kg.

To find the mole fraction of NH3 in concentrated aqueous ammonia, we need to calculate the total moles of both NH3 and H2O.

Total moles = moles of NH3 + moles of H2O

Given:
Moles of NH3 = 1.00 mol
Moles of H2O = 2.44 mol

Total moles = 1.00 mol + 2.44 mol
Total moles = 3.44 mol

Now, we can find the mole fraction of NH3 by dividing the moles of NH3 by the total moles:

Mole fraction of NH3 = moles of NH3 / total moles
Mole fraction of NH3 = 1.00 mol / 3.44 mol

The mole fraction of NH3 in concentrated aqueous ammonia is approximately 0.29.

To find the molal concentration of NH3, we need to calculate the moles of NH3 per kilogram of solvent (H2O).

Given:
Mass of H2O = 2.44 mol × molar mass of H2O

The molar mass of H2O is approximately 18.02 g/mol.

Mass of H2O = 2.44 mol × 18.02 g/mol
Mass of H2O = 43.89 g

To convert the mass of H2O to kilograms:
Mass of H2O = 43.89 g / 1000
Mass of H2O = 0.04389 kg

Now we can calculate the molal concentration of NH3:

Molal concentration (m) = moles of NH3 / mass of H2O in kg
Molal concentration (m) = 1.00 mol / 0.04389 kg

The molal concentration of NH3 in concentrated aqueous ammonia is approximately 22.8 mol/kg.

To find the mole fraction of NH3 in concentrated aqueous ammonia, you need to first calculate the total moles of the solution, which is the sum of moles of NH3 and moles of H2O.

Total moles = moles of NH3 + moles of H2O
Total moles = 1.00 mol + 2.44 mol
Total moles = 3.44 mol

Next, you can calculate the mole fraction of NH3 using the formula:

Mole fraction of NH3 = moles of NH3 / total moles

Mole fraction of NH3 = 1.00 mol / 3.44 mol
Mole fraction of NH3 ≈ 0.2907

Therefore, the mole fraction of NH3 in concentrated aqueous ammonia is approximately 0.2907.

To calculate the molal concentration of NH3, you need to know the mass of the solvent (H2O) in kilograms. The molal concentration is defined as the number of moles of solute (NH3) divided by the mass of the solvent in kilograms.

First, you need to calculate the mass of the solvent (H2O) using its molar mass:

Mass of H2O = moles of H2O × molar mass of H2O
Mass of H2O = 2.44 mol × 18.015 g/mol
Mass of H2O ≈ 43.90 g

Next, convert the mass of H2O to kilograms:

Mass of H2O = 43.90 g ÷ 1000 g/kg
Mass of H2O = 0.0439 kg

Finally, calculate the molal concentration of NH3 using the formula:

Molal concentration = moles of NH3 / mass of H2O (in kg)

Molal concentration = 1.00 mol / 0.0439 kg
Molal concentration ≈ 22.77 mol/kg

Therefore, the molal concentration of NH3 in concentrated aqueous ammonia is approximately 22.77 mol/kg.