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Chemistry, 21.06.2019 17:30
Aaspirin has a density of 1.40 g/cm^3 what is the volume in cubic centimeters of a tablet weighing 320 mg?
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Chemistry, 23.06.2019 02:00
Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon
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Chemistry, 23.06.2019 11:00
Just on number 2 (all parts), and if you do answer explain in detail
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Chemistry, 23.06.2019 11:20
The chemical composition of soil varies with depth. an article in communications in soil science and plant analysis describes chemical analyses of soil taken from a farm in western australia. fifty specimens were each taken at depths 50 and 250 cm. at a depth of 50 cm, the average no3 concentration (in mg/l) was 88.5 with a standard deviation of 49.4. at a depth of 250 cm, the average concentration was 110.6 with a standard deviation of 51.5. find a 95% confidence interval for the difference in no3 concentrations at the two depths.
Answers: 1
Why do fossil fuels such as crude oil contain varying amounts of nitrogen and sulfur? Pls help...
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