Use this equation to calculate the percentage of nitrogen in the sample described below. A sample of a new anti-malarial drug with a mass of 0.2394 g was made to undergo a series of reactions that changed all of the nitrogen in the compound into N₂. This gas had a volume of 18.90 mL when collected over water at 23.80 °C and a pressure of 746.0 torr. At 23.80 °C, the vapor pressure of water is 22.110 torr. When 6.478 mg of the compound was burned in pure oxygen 17.57 mg of CO₂ and 4.319 mg of H₂O were obtained.

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Use this equation to calculate the percentage of nitrogen in the sample described below.
A sample of a new anti-malarial drug with a mass of 0.2394 g was made to undergo a series of reactions that changed all of the
nitrogen in the compound into N₂. This gas had a volume of 18.90 mL when collected over water at 23.80 °C and a pressure of
746.0 torr. At 23.80 °C, the vapor pressure of water is 22.110 torr. When 6.478 mg of the compound was burned in pure oxygen,
17.57 mg of CO2 and 4.319 mg of H₂O were obtained.
Transcribed Image Text:Use this equation to calculate the percentage of nitrogen in the sample described below. A sample of a new anti-malarial drug with a mass of 0.2394 g was made to undergo a series of reactions that changed all of the nitrogen in the compound into N₂. This gas had a volume of 18.90 mL when collected over water at 23.80 °C and a pressure of 746.0 torr. At 23.80 °C, the vapor pressure of water is 22.110 torr. When 6.478 mg of the compound was burned in pure oxygen, 17.57 mg of CO2 and 4.319 mg of H₂O were obtained.
Show that the following equation can be used to calculate the percentage of nitrogen in a sample having a mass of W grams when
the N₂ has a volume of V mL and is collected over water at t in °C at a total pressure of P in torr.
The vapor pressure of water occurs in the equation as Po
H₂0
Percentage N
=
0.04489 x
The equation can be rearranged to give:
0.04489 x
0.4489 x
0.04489 x
0.04489 x
P – PÅ₂0)
V (P PH₂0)
W (273 + tc)
273 + tc
V(P - P₂0)
273 + tc
V(PH₂0
= Percent N x W
P)
273 + tc
273 + tc
V(P PH₂0)
= Percent N x
=
=
W
Percent N x W
Percent N x W
Transcribed Image Text:Show that the following equation can be used to calculate the percentage of nitrogen in a sample having a mass of W grams when the N₂ has a volume of V mL and is collected over water at t in °C at a total pressure of P in torr. The vapor pressure of water occurs in the equation as Po H₂0 Percentage N = 0.04489 x The equation can be rearranged to give: 0.04489 x 0.4489 x 0.04489 x 0.04489 x P – PÅ₂0) V (P PH₂0) W (273 + tc) 273 + tc V(P - P₂0) 273 + tc V(PH₂0 = Percent N x W P) 273 + tc 273 + tc V(P PH₂0) = Percent N x = = W Percent N x W Percent N x W
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