# CHEMISTRY- molarity

posted by .

what is the molarity of the solute in the following solution: a 12.5% w/v Co(NO3)2 solution?

• CHEMISTRY- molarity -

12.5% w/v means 12.5 g Co(NO3)2 in 100 mL solution.
Convert 12.5 g Co(NO3)2 to moles. The M = moles/0.100 = ??

• CHEMISTRY- molarity -

i did that i just added the molecular wieght up wrong. thanks for making me recheck the working.

## Similar Questions

1. ### chemistry

A solution of HCI has a density of 1.18 g/ml and is 36% (m/m). what is the molarity and molality of this solution?
2. ### Chemistry

Given one of the following solution: 50.00mL of 0.10M of K2CrO4 answer the following. 1. How do you prepare the solution?
3. ### Chemistry (URGENT)

Calculate the molarity of the Co^2+ ion in each of the solutions 1-5. The new molarity is given by the molarity of the stock solution multiplied by the dilution factor. Solution: Co(NO3)2 Original molarity: 0.160 Dilution #1: none …
4. ### Chemistry

Hg2+ + 2Cl- → HgCl Mercuric nitrate was standardized by titrating a solution containing 147.6 mg of NaCl(FM 58.44), which required 28.06 ml of Hg(No3)2 solution. Part a: Find the molarity of Hg(No3)2. I already calculated the …
5. ### Chemistry

I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) = 6.386e-1 Molarity of Dye= 5.322e-3 Calculate the mass percent, molarity, molality and …
6. ### Chem

I need to calcuted the molarity from this 12.5 g of ethylene glycol antifreeze dissolved in o.100kg of water. Density of solution is 1.0 g/mL I know molarity if mole of solute / L of solution. I am confused on how to find the L of …
7. ### Science

I need to calcuted the molarity from this 12.5 g of ethylene glycol antifreeze dissolved in o.100kg of water. Density of solution is 1.0 g/mL I know molarity if mole of solute / L of solution. I am confused on how to find the L of …
8. ### chemistry

2 questions, I'm Having trouble figuring out how to calculate the moles of a solute in a solution based on the molarity and the volume. Here is what I'm working with. 1) "Use molarity of the stock solution of aspirin/Fe(No3)3(aq) (0.0044mol) …
9. ### CHEMISTRY

Dye of iodine is prepared by dissolving in ethanol , and 1% ( one percent ) of this solution contains 10 g of solute in 1000 g of solution 1) how many grams of solvent is there in the solution ?
10. ### Chemistry

56mL of a stock solution of hydrobromic acid, HBr, is added to 85mL of water, yielding a solution having a pH of 1.0. What was the molarity of the stock solution?

More Similar Questions