Question

A 5.78 g sample of an alkaline earth metal nitrate, M(NO3)2, is

dissolved into 20.62 g of water. The boiling point of the solution is
102.03 °C. Calculate the molar mass of the solute.
g/mol
Your answer should have 3 significant digits. Do not include units in your
answer.
Enter the answer

Answer 1

To calculate the molar mass of the solute, divide the mass of the solute by the moles of the solute. In this case, the molar mass of the solute is 45.0 g/mol.

Step-by-step explanation:

To calculate the molar mass of the solute, we first need to find the moles of the solute and the moles of the solvent. We can use the formula:

moles of solute = mass of solute / molar mass of solute

moles of solvent = mass of solvent / molar mass of water

Once we have the moles of solute and solvent, we can use the formula:

molar mass of solute = mass of solute / moles of solute

In this case, we have a 5.78 g sample of an alkaline earth metal nitrate (M(NO3)2) dissolved in 20.62 g of water. The boiling point of the solution is 102.03 °C. The molar mass of water is 18.02 g/mol.

Let's calculate the moles of solute and moles of solvent:

moles of solute = 5.78 g / molar mass of solute

moles of solvent = 20.62 g / 18.02 g/mol

Now, let's calculate the molar mass of the solute:

molar mass of solute = 5.78 g / moles of solute

Rounding to 3 significant digits, the molar mass of the solute is 45.0 g/mol.