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Chemistry, 23.06.2019 01:10
Volume is a measurement of how fast particles of a substance are moving
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Chemistry, 23.06.2019 04:10
Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating
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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
How many moles of boron are in 1.39x10^24 atoms...
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