A vat of hydrogen peroxide (H2O2) contains 455 grams of oxygen atoms. How many molecules of (H2O2) are in the?
The number of molecules is measured in moles (1 mole = 6.0221415×10^23) The formula is moles = mass / RMM (relative molecular mass) your mass is 455 (grams of oxygen atoms) so 455/16.0 (oxygen's RMM). 455 / 16 = 28.4375 28.4375 Moles of oxygen. There are two oxygen atoms in hydrogen peroxide so the moles of oxygen molecules (02) is halved. 14.21875 Moles. Now there are the same number of oxygen molecules (O2) as H2O2 can you see? So there must be the same number of H2O2 molecules, 14.21875 Moles. Which if you were wondering come to 8.56273245 × 10^24 molecules, I think. Well, I hope that's right. Feel free to correct me, it's late at night!
A vat of hydrogen peroxide(H2O2) contains 455 grams of oxygen atoms. How many molecules of(H2O2) are in there?
455/1mole of oxygen= number of moles=x x/2=number of H2O2 molecules=y y(6.022E23)= how many H2O2 molecules
A vat of hydrogen peroxide (H2O2) contains 455 grams of oxygen atoms. How many molecules of (H2O2) are in vat?
455 g O * 1 mol/16.0 g = 28.4375 mol O 28.4375 mol O * 1 mol H2O2/2 mol O = 14.21875 mol H2O2 14.21875 mol H2O2 * 6.022 x 10^23 molecules/1 mol = 8.56 x 10^24 molecules H2O2 Therefore the correct answer is 5. Cheers.
One mole of hydrogen peroxide, H2O2, would consist of how many molecules?
Your first question's answer is B). A mole is just a unit that means 6.02 × 10^23 units of something (in this case H2O2 molecules). There are 6.02 × 10^23 molecules of H2O2 in a mole of H2O2. Your second question's answer is D). The atomic mass of the molecule in amu is equal to the molar mass a mole of the substance in grams. 2(1 amu H) + 2(16 amu O) = 32 amu/molecule H2O2 2(1 g/mol H) + 2(16 g/mol O) = 32 g/mol H2O2
How many atoms are in one mole of hydrogen peroxide, H2O2?
one mole of hydrogen peroxide contains 6.02 x 10^23 molecules of hydrogen peroxide. And each molecule contains 4 atoms, so the answer is 4 x 6.02 x 10^23. Remember - a mole is a quantity of something, a mole of cars is 6.02 x 10^23 cars. And that's a lot of cars and even more atoms.
A vat of H202 contains 455 grams of oxygen. How many molecules of H202 are in the vat?
I would try to keep it short and simple assuming you have basic knowlege about Mole Concept-In 1 molecule of H2O2, 2 O atoms are present. That means no. of H2O2 molecules present would be half of no. of O atoms present in the vat. Now dividing the given mass (455g) by molar mass of O (16g) gives us no. of moles of O.That means 455/16 moles O are present.Multiplying moles by Avogadro's no. would give us no. of atoms of O.Implies (455/16)*N atoms of oxygen present. (where N=6.023*10^23, Avogadro's no.). Half of no. of O atoms would give us no. of H2O2 molecules.So answer is (455/32)*N.
CHEMISTRY HELP MI!!!! molecules?
Determine the molecular weight of H2O2 and the percentage of oxygen in each molecule, and that will make calculating the number of molecules easy. Moles times avagodros number.
Struggling on a chemistry problem?
Let UNITs guide you; always USE THEM in your calculation to prevent errors Firstly, 2 atoms O / molecule H2O2 atoms of O = (455 g O / atwt O) * 6.022E23 atoms of O / mole = ?? molecules H2O2 = (atoms of O / (2 atoms O / molecule H2O2) = ?? Plug and SOLVE Basic mathematics is a prerequisite to chemistry – I just try to help you with the methodology of solving the problem.