Two questions which I figured out I couldn't figure out how to do (they dont look hard, though
)
A sample of 1.00g of a pesticide is analysed for its arsenci content by precipitation of the arsenic as the sulfide, As2S3. If 0.123g of the sulfide is obtained, the percentage by mass of arsenic in the pesticide is:
A) 3.75
B) 7.50
C) 37.5
D) 75.0
Equal masses of the two gases oxygen (O2) and sulfur dioxide (SO2) are placed in separate vessels. Both vessels have the same volume and are at the same temperature. The pressure exerted by the oxygen is 100kPa. The pressure, in kPa, exerted by the So2 is closest to:
A) 25
B) 50
C) 100
D) 200
:wave:
A sample of 1.00g of a pesticide is analysed for its arsenci content by precipitation of the arsenic as the sulfide, As2S3. If 0.123g of the sulfide is obtained, the percentage by mass of arsenic in the pesticide is:
A) 3.75
B) 7.50
C) 37.5
D) 75.0
Equal masses of the two gases oxygen (O2) and sulfur dioxide (SO2) are placed in separate vessels. Both vessels have the same volume and are at the same temperature. The pressure exerted by the oxygen is 100kPa. The pressure, in kPa, exerted by the So2 is closest to:
A) 25
B) 50
C) 100
D) 200
:wave: