Find the percent by mass of sodium chloride in a 1.45M NaCl solution. The density of the solution is 1.05g/mol .

(Note: I don't think the density is 1.05 g/mol; rather, I think it is 1.05 g/mL)

Percent by mass means grams solute per 100 g solution.
molarity = moles/L of solution. So we change molarity to grams and L of solution to total mass.

1.45 M NaCl = 1.45 moles/L. 1.45 moles NaCl x molar mass NaCl = ?? grams NaCl.

How much does a liter of solution weigh?
1.05 g/mL x 1000 mL = 1050 grams.

So we have ??g NaCl/1050 grams solution and multiply by 100 to change to percent.

Oh, sodium chloride, the salty duo! Let's calculate that percent by mass with a sprinkle of humor, shall we?

To find the percent by mass of sodium chloride in a solution, we need a little bit of info. You've already given me the concentration (1.45M) and the density (1.05g/mol). Fantastic!

Now, let's clown around with some math. We'll start by calculating the molar mass of sodium chloride, which is the sum of the atomic masses of sodium (Na) and chloride (Cl). It's like adding a dash of sodium and a pinch of chloride to make this tasty compound!

The atomic mass of sodium (Na) is approximately 22.99 g/mol, and the atomic mass of chlorine (Cl) is approximately 35.45 g/mol. Now, if we add those two together, we get a molar mass of sodium chloride of 58.44 g/mol.

Next up, we need to find the mass of sodium chloride in the solution. Since we know the density of the solution is 1.05 g/mL, and we have a concentration of 1.45 M, we can use some conversion magic to find the mass.

First, let's convert the concentration from moles per liter (M) to moles per milliliter (mol/mL). This means we divide the concentration (1.45 M) by 1000 to get 0.00145 mol/mL.

Now, let's use the density (1.05 g/mL) to convert the volume of the solution into mass. We multiply the volume (1 mL) by the density (1.05 g/mL) to get 1.05 g.

Last but not least, we multiply the mass of the solution (1.05 g) by the concentration (0.00145 mol/mL) to find the mass of sodium chloride. Drumroll, please!

1.05 g * 0.00145 mol/mL = 0.0015225 g

Now, to get the percent by mass, we divide the mass of sodium chloride (0.0015225 g) by the mass of the solution (1.05 g) and multiply by 100.

(0.0015225 g / 1.05 g) * 100 = 0.145%

So, the percent by mass of sodium chloride in the 1.45M NaCl solution is approximately 0.145%. It's like having a pinch of salt in a gallon of water!

To find the percent by mass of sodium chloride in a solution, we need to first calculate the mass of sodium chloride present in the solution.

Step 1: Calculate the molar mass of sodium chloride (NaCl):
The molar mass of one sodium (Na) atom is approximately 22.99 g/mol, and the molar mass of one chlorine (Cl) atom is approximately 35.45 g/mol. Therefore, the molar mass of NaCl is 22.99 + 35.45 = 58.44 g/mol.

Step 2: Calculate the moles of NaCl:
Since we are given the molarity (1.45M) and volume is not given, we cannot directly calculate the number of moles. Instead, we need to use the density to find the mass of the solution.

The density of the solution is given as 1.05 g/mL. We need to convert the volume into grams, since the molar mass of NaCl is given in grams per mole.

Step 3: Calculate the mass of the solution:
Since the concentration is given in moles per liter (M), we will assume a volume of 1 liter (1000 mL) for simplicity.

Mass of the solution = density of the solution * volume of the solution
= 1.05 g/mL * 1000 mL
= 1050 g

Step 4: Calculate the mass of NaCl in the solution:
The % by mass is given by mass of NaCl divided by mass of solution, multiplied by 100.

Mass of NaCl = molar mass of NaCl * moles of NaCl
= 58.44 g/mol * moles of NaCl

% by mass of NaCl = (mass of NaCl / mass of solution) * 100
= ((58.44 g/mol * moles of NaCl) / 1050 g) * 100
= (58.44 * moles of NaCl) / 1050 %

We are not given the exact volume of the solution, so we cannot determine the exact number of moles of NaCl present. However, we can calculate the percentage by mass once we have the number of moles.

Please provide the volume of the solution in order for us to complete the calculation.

To find the percent by mass of sodium chloride in a solution, we need to use the formula:

Percent by mass = (mass of solute / mass of solution) x 100

In this case, sodium chloride (NaCl) is the solute, and the solution includes both the solute and the solvent. The mass of the solution can be calculated using the density of the solution.

First, let's calculate the mass of the solution:

Mass of solution = density x volume

The volume of the solution is not given in the question, so we can't calculate the exact mass of the solution. However, we can still find the percent by mass of sodium chloride by assuming a certain volume, such as 1 liter.

Now, let's calculate the mass of sodium chloride (the solute):

Mass of NaCl = molarity x molar mass x volume

The molarity of the solution is given as 1.45M (1.45 moles per liter), and the molar mass of NaCl is 58.44 g/mol.

Assuming a volume of 1 liter, we can calculate the mass of NaCl:

Mass of NaCl = 1.45M x 58.44 g/mol x 1 L
= 84.726 g

Finally, we can calculate the percent by mass of sodium chloride:

Percent by mass = (mass of NaCl / mass of solution) x 100
= (84.726 g / mass of solution) x 100

Remember, we assumed the volume of the solution to be 1 liter. If you have the actual volume, you can substitute it into the equation.

I hope this explanation helps you understand how to calculate the percent by mass of sodium chloride in a solution!