In a gas chromatography experiment, a mixture of two compounds (A and B) was separated for analysis. A chart recorder that fed paper at a constant rate of 100 mm. per minute was used to record the chromatogram, and a mark was made on the chart at the time the sample was injected. The first peak on the chromatogram corresponds to compound A, and that peak was observed at a distance of 5.73 cm from the sample injection point, and it had a height of 3.1 cm and a width at half-height of 1.53 cm. The peak corresponding to B was observed at a distance of 8.02 cm from the injection point, and it had a height of 3.6 cm and a width at half-height of 1.25 cm. What was the retention time for compound B (in seconds)
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Chemistry, 21.06.2019 20:30
You are to give ampicillin with a recommended dose of 25mg/kg to a child with a mass of 29kg. if stock on hand is 250mg/capsule how many capsules should be given?
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Chemistry, 22.06.2019 02:00
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Chemistry, 22.06.2019 19:20
For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the waterβsoluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) β pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)
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Chemistry, 22.06.2019 20:00
State one important difference between a physical change and a chemical change?
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In a gas chromatography experiment, a mixture of two compounds (A and B) was separated for analysis....
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