how do i get from Molarity to % g / mL ???

I have a concentration of .2379 M.

Let's say your molarity is 2.0 M.

M = mols/L solution

% w/v = grams solute/100 mL.

So you have 2.0 M = 2.0 mols/L. Convert 2.0 mols of whatever you have to grams solute. That will be grams = mols x molar mass. That gives you grams/L solution so you divide both numerator and denominator by 10 to give you grams/100 mL and that is % w/v.

thank you for answering!

To convert from molarity (M) to % g/mL, you will need to know the molar mass of the solute. Once you have the molar mass, you can use the following steps to convert from molarity to % g/mL:

Step 1: Convert molarity (M) to moles per liter (mol/L):
To do this, multiply the molarity by the volume (in liters) of the solution you have. Let's assume you have 1 liter of the solution. In your case, the molarity is 0.2379 M, so the number of moles per liter is:

0.2379 mol/L * 1 L = 0.2379 mol

Step 2: Calculate the mass of the solute (in grams):
Multiply the number of moles from step 1 by the molar mass of the solute. Let's assume the molar mass of your solute is 100 g/mol. In this case, the mass of the solute is:

0.2379 mol * 100 g/mol = 23.79 g

Step 3: Convert mass (grams) to % g/mL:
To convert the mass to % g/mL, divide the mass by the volume (in mL) of the solution you have and multiply by 100. Let's assume you have 100 mL of the solution. In this case, the % g/mL is:

(23.79 g / 100 mL) * 100 = 23.79% g/mL

Therefore, with a molarity of 0.2379 M, the % g/mL is 23.79% g/mL.