How many valence electrons are in fluorine?

A great deal of the blue ridge was eroded the road it rock eventually settled in virginia's coastal plain what process caused this

balloon filled with water is places in a microwave until it bursts. Name two different physical changes that occur during this reaction

If 10.0 grams of NaHCO3 is added to 10.0 g of HCl, determine the efficiency of baking soda as an antacid if 6.73 g of NaCl was produced from the reaction. (In other words, calculate the percent yield of sodium chloride produced).

You were asked to determine the identity of an unknown liquid and can measure only one physical property. you heat the liquid and record that the liquid turns to vapor at hundred degrees Celsius. this demonstrates what physical property

A parent who is convinced that children have rights that ought not to be interfered with by adults is most likely:

If a fast moving car making a loud noise approaches and moves past the person what will happen as the distance between the two increases?

Which of the following would be an example of a trophic relationship? Select all that apply. photosynthetic plankton respiring oxygen into the ocean small marine life feeding on the algae and plankton that have descended to the ocean floor a

Fumaric acid is an organic compound composed of 41.39%, 3.47%, and the rest oxygen. If 0.288 mol of fumaric acid has a mass of 33.4 g, what are the empirical and molecular fomulas of fumaric acid

What is an isotope? Give an example of an element with isotopes.

Consider the reaction between liquid water and aqueous magnesium nitride to form solid magnesium oxide and ammonia gas. If magnesium nitride is present in excess, how many moles of water are needed to form 9.17*1023 ammonia molecules?