how much oxygen does a mass of 10 grams contain
um, 10 grams?
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To determine how much oxygen a mass of 10 grams contains, you need to know the molar mass of oxygen and use the concept of moles.
The molar mass of oxygen (O) is approximately 16 grams per mole. This means that 1 mole of oxygen weighs 16 grams.
To find the number of moles in 10 grams of oxygen, divide the given mass by the molar mass:
Number of moles = Mass of oxygen / Molar mass of oxygen
= 10 grams / 16 grams per mole
Calculating this, we get:
Number of moles = 0.625 moles
Since 1 mole of any substance contains 6.022 x 10^23 particles (Avogadro's number), we can determine the number of oxygen atoms using the moles:
Number of oxygen atoms = Number of moles x Avogadro's number
= 0.625 moles x 6.022 x 10^23
Calculating this, we get:
Number of oxygen atoms = 3.76375 x 10^23 atoms
Therefore, a mass of 10 grams of oxygen contains approximately 3.76 x 10^23 oxygen atoms.