How many formula units are in 1.31 mg of

hydrogen peroxide (H2O2)?
Answer in units of formula units.

For 508 g of butadiene (C4H6) calculate the
number of moles.
Answer in units of mol.

Calculate the number of molecules.
Answer in units of molec.
016 1.0

units = grams/formula mass

mols = grams/molar mass

molecules in what?
1 mol of anything contains 6.02E23 of that material.

To find the number of formula units in 1.31 mg of hydrogen peroxide (H2O2), we first need to know the molar mass of H2O2. Hydrogen has a molar mass of 1 g/mol, and oxygen has a molar mass of 16 g/mol. Since there are two atoms of hydrogen and two atoms of oxygen in one molecule of H2O2, the molar mass of H2O2 is 2(1) + 2(16) = 34 g/mol.

Next, we can convert the mass of H2O2 from mg to grams by dividing it by 1000. 1.31 mg = 1.31/1000 = 0.00131 g.

Now we can use the formula: number of formula units = (mass of substance in grams)/(molar mass of substance in grams per mole).

Number of formula units = (0.00131 g)/(34 g/mol) = 0.0000385 mol.

Finally, we need to convert the number of moles to formula units. Since one mole is equal to Avogadro's number (6.022 x 10^23) of formula units, we can multiply 0.0000385 mol by Avogadro's number to get the result:

Number of formula units = 0.0000385 mol * (6.022 x 10^23 formula units/mol) = 2.32 x 10^19 formula units.

Therefore, there are approximately 2.32 x 10^19 formula units in 1.31 mg of hydrogen peroxide (H2O2).

For the second question, to calculate the number of moles in 508 g of butadiene (C4H6), we need to know the molar mass of C4H6. The molar mass of carbon (C) is 12 g/mol, and the molar mass of hydrogen (H) is 1 g/mol. Therefore, the molar mass of C4H6 is 4(12) + 6(1) = 54 g/mol.

Using the formula: number of moles = (mass of substance in grams)/(molar mass of substance in grams per mole), we can calculate the number of moles in 508 g of butadiene:

Number of moles = 508 g / 54 g/mol = 9.41 mol.

Therefore, there are approximately 9.41 moles in 508 g of butadiene (C4H6).

For the third question, more information is needed. Please provide the necessary details to calculate the number of molecules.