What is the amount of substance oxygen o2 weighing 6.4 g?
July 29, 2021 | education|
m (O2) = 6.4 g
n (O2) -?
1) Using the periodic system of D.I.Mendeleev, calculate the molar mass of oxygen:
M (O2) = Mr (O2) = Ar (O) * N (O) = 16 * 2 = 32 g / mol;
2) Calculate the amount of oxygen substance:
n (O2) = m (O2) / M (O2) = 6.4 / 32 = 0.2 mol.
Answer: The amount of substance O2 is 0.2 mol.
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