Is being created or destroyed by the chemical reaction? created destroyed neither created nor destroyed If is being created or destroyed, what is the rate at which it is being created or destroyed 9 seconds after the reaction starts? Round your answer to significant digits. Also be sure your answer has the correct unit symbol. If is being created or destroyed, what is the average rate at which it is being created or destroyed during the first 9 seconds of the reaction? Round your answer to significant digits. Also

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

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.