How many moles of bromine are there in a 0.35 mL dichloromethane solution of 10% bromine?

Density of Bromine = 3.10g/mL
Density of dichloromethane = 1.33g/mL

I assume this is percent w/v.

10% bromine means 10g Br2 in 100 mL soln.
How much is in 0.35 mL soln =
10 g x (0.35/100) = 0.035 g Br2.
Then mols = grams/molar mass.

Well, if you have a 0.35 mL solution, that means you have enough bromine to fill a tiny swimming pool for bacteria, right? Anyway, let's get down to business.

First, we need to find the mass of the solution, which is (0.35 mL)(1.33 g/mL) = 0.4655 g.

Since we know that the solution is 10% bromine, we can find the mass of bromine in the solution by multiplying the mass of the solution by 10%. So, the mass of bromine is (0.10)(0.4655 g) = 0.04655 g.

Now, we can calculate the moles of bromine using its molar mass, which is approximately 79.904 g/mol. So, the moles of bromine is (0.04655 g)/(79.904 g/mol) ≈ 0.000582 moles.

So, there are approximately 0.000582 moles of bromine in that 0.35 mL dichloromethane solution. It's mole-tastic!

To calculate the number of moles of bromine in the solution, we need to follow these steps:

Step 1: Calculate the mass of the solution.
Mass = Volume * Density
Mass = 0.35 mL * 1.33 g/mL
Mass = 0.4655 g

Step 2: Calculate the mass of bromine in the solution.
Mass of bromine = 10% * Mass of solution
Mass of bromine = 0.10 * 0.4655 g
Mass of bromine = 0.04655 g

Step 3: Convert the mass of bromine to moles by using the molar mass of bromine.
Molar mass of bromine = 79.9 g/mol
Moles of bromine = Mass of bromine / Molar mass of bromine
Moles of bromine = 0.04655 g / 79.9 g/mol
Moles of bromine = 0.000582 moles

Therefore, there are approximately 0.000582 moles of bromine in a 0.35 mL dichloromethane solution of 10% bromine.

To determine the number of moles of bromine in the dichloromethane solution, we need to follow a series of steps:

Step 1: Calculate the mass of the bromine in the solution.
Given that the volume of the solution is 0.35 mL and the density of bromine is 3.10 g/mL, we can calculate the mass of bromine using the formula:
Mass = Volume x Density
Mass of bromine = 0.35 mL x 3.10 g/mL

Step 2: Calculate the mass of the dichloromethane in the solution.
Since the solution contains 10% bromine, the remaining 90% is dichloromethane. The total mass of the solution can be obtained by dividing the mass of the bromine by 10%. Then, the mass of dichloromethane can be calculated by subtracting the mass of the bromine from the total mass of the solution.

Step 3: Calculate the moles of bromine.
Using the molar mass of bromine, which is 79.90 g/mol, we can convert the mass of bromine into moles.

Let's now perform the calculations:

Step 1: Mass of bromine = 0.35 mL x 3.10 g/mL = 1.085 g

Step 2: Total mass of solution = Mass of bromine / 10% = 1.085 g / 0.1 = 10.85 g
Mass of dichloromethane = Total mass of solution - Mass of bromine = 10.85 g - 1.085 g = 9.765 g

Step 3: Moles of bromine = Mass of bromine / Molar mass of bromine = 1.085 g / 79.90 g/mol

By plugging in the values and performing the calculation, you will find the number of moles of bromine in the 0.35 mL dichloromethane solution of 10% bromine.