Mathematics, 12.02.2020 17:44 yuvallevy14
A researcher was attempting to quantify the amount of (DDT) in spinach using gas chromatography mass spectrometry (GCMS). First attempts using external calibration proved difficult, as reproducibility and external standard agreement were poor. To overcome these problems, the researcher used the internal standard calibration method with chloroform as the internal standard. To begin, the researcher analyzed a sample containing 6.58 mg/L DDT standard and 2.82 mg/L chloroform as the internal standard, which produced peak areas of 3713 and 10899 for the DDT and chloroform, respectively. Determine the response factor ( F ).
Answers: 3
Mathematics, 21.06.2019 14:00
Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.
Answers: 1
Mathematics, 21.06.2019 17:00
Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars
Answers: 1
Mathematics, 21.06.2019 20:00
The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16
Answers: 3
A researcher was attempting to quantify the amount of (DDT) in spinach using gas chromatography mas...
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