Determine in which substance the mass fraction of oxygen is greater a) in carbon monoxide CO or “laughing gas” N2O

| November 16, 2020 | education

Determine in which substance the mass fraction of oxygen is greater a) in carbon monoxide CO or “laughing gas” N2O b) in carbon dioxide CO2 or sulfur dioxide SO2

To solve problem 1, we write down the given: CO and N2O
Find: in which of the oxides the mass fraction of oxygen is greater.
Decision:
Let’s write down the formula for finding the mass fraction.
w = n * Ar / Mr
Let’s calculate the relative molecular weight of carbon monoxide (II) and the mass fraction of oxygen in it.
Mr (CO) = 12 + 16 = 28
w (O) = 16/28 = 0.57 or 57%
Let’s calculate the relative molecular weight of nitric oxide (I) and the mass fraction of oxygen in it.
Mr (N2O) = 14 * 2 + 16 = 44
w (O) = 16/44 = 0.37 or 37%
Answer: the mass fraction of oxygen is greater in CO

To solve the problem, we write down given: СО2 and SO2
Find: in which of the oxides the mass fraction of oxygen is greater.
Decision:
Let’s write down the formula for finding the mass fraction.
w = n * Ar / Mr
Let’s calculate the relative molecular weight of carbon monoxide (IV) and the mass fraction of oxygen in it.
Mr (CO2) = 12 + 16 * 2 = 44
w (O) = 16 * 2/44 = 0.73 or 73%
Let’s calculate the relative molecular weight of sulfur (IV) oxide and the mass fraction of oxygen in it.
Mr (SO2) = 32 + 16 * 2 = 64
w (O) = 16 * 2/64 = 0.5 or 50%
Answer: the mass fraction of oxygen is greater in CO2



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