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Chemistry, 23.06.2019 09:20
Which of the following occurs along coasts during the day?
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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.
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Chemistry, 23.06.2019 13:50
Which compounds are the brΓΈnsted-lowry bases in this equilibrium: hc2o4β + h2bo3β h3bo3 + c2o42β ? a. h2bo3β and h3bo3 b. hc2o4β and h3bo3 c. hc2o4β and c2o42β d. h2bo3β and c2o42β e. hc2o4β and h2bo3β
Answers: 2
Any of two or more forms of the same element which differ only in the number of neutrons their atoms...
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