fine the molarity of 15 mg of chronium (111) ions in 1 mL of solution? thanks?

Answer 1

1. Look up the Ar of chromium.
2. Calculate the moles: 0.015/Ar
3. Now divide the moles by 0.001 to get the molarity.

Answer 2

first, find the number of moles you have in 15mg of chronium ions. (i'm sorry i cant help you because i do not have a periodic table with me right now)
to calculate the number of moles you have divide the 15mg by the molar weight of the chronium ions.
convert the milligrams into grams first then,
number of moles = 0.015g / (molar weight of chronium ions)

after you have gotten the number of moles. you could already have the molarity of the solution using this formula:

Molarity = moles of solute / Liters of solution

substitute the values you have into the equation.

note: convert 1mL into Liters. --> 0.001 L

Molarity = moles of solute (chronium ions) / 0.001 L

and your final answer would be ----> ____ mol / L or M

"M" stands for molar


hope i had helped youd.ü