Which of the following chemical formulas shows a covalent compound? A. CO2 B. MgO C. NaCl D. HBr

A water sample consists of the following cadmium species and their percentages of the total cadmium concentration: Cd2 (36 %); CdHCO3 - (14 %); CdCl - (25 %); and Cd (OH) 2 (25 %). What percentage of Cd is toxic to aquatic organisms

Is fluorine a element, compound or mixture

Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g/cm3. (1cm3 = 1ml) select one: a. 18.5 ml b. 23.6 ml c. 42.4ml d. 31.2 ml

What has to do with the closeness of a measurement to the true value?

On a test, Helena is defining energy. Which must she include in order to get her answer marked correct? making objects more compact the ability to do work carrying through matter and space the bonds of atoms

Suppose the average concentration of copper in water is measured to be 2.5 x 10" M. a. Express this concentration in mg/L. b. Express this concentration in ug/L. c.

If I add water to oil what will happen

Commercial fertilizers, which are made by humans, are used to enrich soil for healthier crops. However, erosion may carry the fertilizer chemicals to the oceans. The presence of these chemicals may cause certain kinds of algae to reproduce rapidly.

A cube of iron has a temperature of 35°C. It is placed on top of a hot surface with a temperature of 175°C. What will happen to the iron? A) Its temperature will decrease. B) Heat will flow from the hot surface into the iron.

Density differences cause the