Advertisements
Advertisements
Question
How many moles of O2 are there in 1.20 × 1022 oxygen molecules ?
Advertisements
Solution
1.20 × 1022 molecules of oxygen
One mole of oxygen contains 6.022 × 1023 molecules.
1.20 × 1022 molecules of oxygen contain = 1.20 × 1022 / 6.022 × 1023 = 0.01099 moles.
Hence, 1.20 × 1022 molecules of oxygen contain 0.0199 moles of oxygen.
APPEARS IN
RELATED QUESTIONS
How many moles are 3.6 g of water ?
Define the term.
Molar volume
Define the term:
Avogadro’s number
Fill in the blank
Avogadro's number is equal to ______
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
Determine the percentage of oxygen in the ammonium nitrate?
Define the term:
Mole
Calculate the mass of 0.1 mole of the following:
Na2SO4.10H2O
(Ca = 40, Na = 23, Mg = 24, S = 32, C = 12, Cl = 35.5, O = 16, H = 1)
What mass of Ca will contain the same number of atoms as are present in 3.2 g of S?
Calculate the number of gram atoms in 4.6 gram of sodium.
Cinnabar (HgS) is a prominent ore of mercury. How many grams of mercury are present in 225 g of pure HgS? Molar mass of Hg and S are 200.6 g mol–1 and 32 g mol–1 respectively.
