please help me I cant figure out this answer I have tried to summit my answer 5 times and its incorrect

please help me I cant figure out this answer I have tried to summit my answer 5 times and its incorrect

250g of water were added to 150g of 30% salt solution. What is the new concentration of the mixture?

250g of water were added to 150g of 30% salt solution. What is the new concentration of the mixture? PLEASE HELP :D

A pharmacist needs to prepare a 1.0% (m/v) silver nitrate solution. The pharmacy has on hand 24 mL of 3.0% (m/v) stock solution of silver nitrate. Explain in a sentence how the more dilute solution can...

2x2 +9x+4=0 find the solutions

#1) 4.555 moles of NaCl is dissolved in 8000 mL of water, calculate the molarity. #2) You have 300 mL of a 1.5 M HCl solution. How many moles of HCl does this solution contain? #3)...

I don't know how to set this up and I am needing help. My professor did not tell me how to do this nor does my book

katy runs a dry cleaning business and needs 6% phosphoric acid solution to remove a stain from a suit. Katy has on hand 14% phosphoric acid solution and a 2% phosphoric acid solution. How many milliliters...

mixtures and solutions

Calculate the vapor pressure of water above a solution made by adding 15.0 g of lactose (C12H22O11) to 100.0 g of water at 338 K. (vapor pressure of pure water at 338 K is 187.5 torr) P...

Calculate the vapor pressure of water above a solution made by adding 15.0 g of lactose (C12H22O11) to 100.0 g of water at 338 K. (vapor pressure of pure water at 338 K is 187.5 torr) P...

0.02 M CuSO4 Can you check my work? Since CuSO4 is a m + nm, it is an ionic compound and will break up into ions in a polar? solution. (0.02 mol CuSO4 / 1.0 L...

At 20°C, a 3.54 M aqueous solution of ammonium chloride has a density of 1.0512 g/mL. The formula weight of NH4Cl is 53.50 g/mol. options: 6.95 3.36 0.297 4.10 18.00 I...

x+3y=-5 9x+30y=-48

Solve sin(2θ) = cos(θ) for 0 ≤ θ < 2π (Hint: there will be a total of 4 solutions!)

how many mg are there in one dose?

Find all solutions on the interval 0< (or equal to) theta < 2pi Help! Show steps please. thanks

Find all solutions on the interval [0,2pi) Please help and show steps!! Thank you!

Help!! Find all solutions. Please show steps. Thank you!

Find all solutions. Where k is the integer. please show steps! thank you

You have two solutions one contains 40% acid, the other 10% acid. You require 10 gallons of a 20% solution. How much of the 10% should you use? I have to write an equation and solve.

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