What is kinetic energy? a. the energy an object has due to its motion b. the energy derived from chemical reactions c. the energy an object has due to its position d. the energy an object releases as heat

What element has similar physical and chemical properties as boron.

How do you determine the percent yield of a chemical reaction

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.