The density of hydrogen peroxide, H2O2, is 1.45 g/mL. How many molecules of H2O2 are in 0.350 L of hydrogen peroxide?
The molar mass of H2O2 is 34.01 g/mol.
I assume you are talking about 100% H2O2. Technically there is no such thing but we will play like we can make 100% stuff. I bought some 90% stuff once and used it for some experiments. It's rough stuff.
mass = volume x density
mass = 350 mL x 1.45 g/mL = 507.5 g
mols H2O2 in 507.5 g = 507.5/34.01 = 14.9 mols.
There are 6.02E23 molecules in a mol of molecules........so you can convert.
Oh, I see! So we need to calculate the number of molecules of H2O2 in 0.350 L of hydrogen peroxide, right? Well, let's do a little math!
First, we'll convert liters to milliliters because the density you provided is in grams per milliliter. So, 0.350 L is equal to 350 mL.
Now, we can find the mass of 350 mL of hydrogen peroxide using density. Given that the density is 1.45 g/mL, we can multiply it by the volume (350 mL) to get the mass: 1.45 g/mL * 350 mL = 507.5 g.
Next, we'll use the molar mass of H2O2, which is 34.01 g/mol. To find the number of moles, we can divide the mass by the molar mass: 507.5 g / 34.01 g/mol = 14.91 mol.
Finally, we'll use Avogadro's number, which is 6.022 × 10^23 molecules/mol, to convert moles to molecules. So, 14.91 mol * 6.022 × 10^23 molecules/mol = 8.98 × 10^24 molecules of H2O2.
So, in 0.350 L of hydrogen peroxide, there are approximately 8.98 × 10^24 molecules of H2O2. That's a lot of molecules! You might need a large microscope to see them all!
To calculate the number of molecules of hydrogen peroxide (H2O2) in 0.350 L, we need to follow these steps:
Step 1: Convert the volume in liters to milliliters.
Since 1 L = 1000 mL, we have:
0.350 L = 0.350 x 1000 mL = 350 mL
Step 2: Calculate the mass of H2O2 in grams.
The density of H2O2 is given as 1.45 g/mL, so the mass of 350 mL of H2O2 can be calculated as:
Mass = Density x Volume
Mass = 1.45 g/mL x 350 mL = 507.5 g
Step 3: Calculate the number of moles of H2O2.
Using the molar mass of H2O2 (34.01 g/mol), we can calculate the number of moles:
Number of moles = Mass / Molar mass
Number of moles = 507.5 g / 34.01 g/mol = 14.91 mol
Step 4: Calculate the number of molecules.
Avogadro's number states that 1 mole of any substance contains 6.022 x 10^23 molecules. Therefore, the number of molecules can be calculated as:
Number of molecules = Number of moles x Avogadro's number
Number of molecules = 14.91 mol x (6.022 x 10^23 molecules/mol) = 8.981 x 10^24 molecules
Therefore, there are approximately 8.981 x 10^24 molecules of H2O2 in 0.350 L of hydrogen peroxide.
To determine the number of molecules of H2O2 in 0.350 L of hydrogen peroxide, you can use the following steps:
Step 1: Calculate the mass of the hydrogen peroxide.
Mass = density × volume
Mass = 1.45 g/mL × 0.350 L
Step 2: Calculate the moles of hydrogen peroxide.
Moles = mass / molar mass
Moles = (1.45 g/mL × 0.350 L) / 34.01 g/mol
Step 3: Calculate the number of molecules.
Number of molecules = moles × Avogadro's number
Number of molecules = (1.45 g/mL × 0.350 L) / 34.01 g/mol × 6.022 × 10^23 molecules/mol
Now, let's plug in the values and solve the equation:
Mass = 1.45 g/mL × 0.350 L = 0.5075 g
Moles = 0.5075 g / 34.01 g/mol = 0.01493 mol
Number of molecules = 0.01493 mol × 6.022 × 10^23 molecules/mol
Therefore, there are approximately 8.997 × 10^21 molecules of H2O2 in 0.350 L of hydrogen peroxide.