Although atoms can be rearranged in physical or chemical changes they are never or This is referred to as the law of conservation of mass.
CO2 likely has ( covalent / ionic ) bonds and KFl is likely to contain ( covalent / ionic ) bonds.

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

When electrolyzing copper (ll) chloride, what reaction takes place at the anode? what reaction takes place at the cathode?