In this lab, you determined the % water-soluble compounds in a piece of gum. a related lab ap students do is to heat a hydrated compound to drive off the water, leaving behind the non-hydrated form. use the following made up data to calculate the % water and the moles of water in a sample of hydrated copper sulfate.

Modern weaponry has increased the number of deaths in wars and violent conflicts.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals