# Finding molarity when % by mass is known

• erjkism
In summary, molarity is a unit of concentration that measures the number of moles of a solute per liter of solution. It is calculated by dividing the number of moles of solute by the volume of the solution in liters. Molarity can be determined if % by mass is known by using a specific formula. Finding molarity when % by mass is known is important in accurately determining the concentration of a solution. There is a direct relationship between molarity and % by mass, as an increase in molarity leads to an increase in % by mass and vice versa.
erjkism
i need to find the molarity of acetic acid from this data:

CH3COOH (molar mass 60.05) (% by mass: 99.7) (density: 1.05 g/ml)

how do i do it??

Find out the mass in grams of 99.7 % of the compound and d = m/v and M = n/v. Hope that helps.

One more thing that I want to add to the previous post is that after you find the mass you should convert it to moles and apply it to the molarity formula.

## 1. What is molarity?

Molarity is a unit of concentration that measures the number of moles of a solute per liter of solution.

## 2. How is molarity calculated?

Molarity is calculated by dividing the number of moles of solute by the volume of the solution in liters.

## 3. Can molarity be determined if % by mass is known?

Yes, molarity can be determined if % by mass is known by using the formula: molarity = (% by mass/ molecular weight) x (1000/volume in mL).

## 4. What is the significance of finding molarity when % by mass is known?

Finding molarity when % by mass is known is important in accurately determining the concentration of a solution. This information is crucial in many scientific experiments and processes.

## 5. Is there a relationship between molarity and % by mass?

Yes, there is a direct relationship between molarity and % by mass. As the molarity of a solution increases, the % by mass also increases and vice versa.

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