Consider the nuclear equation below. 239/94 Pu--> X + 4/2 He. What is X?

Which of the following properties of water allows an insect to "climb" up a tube? Capillary action Cohesion Adhesion Density

If you could spend a billion dollars (1 x 10 to the 9th power) per second, how many years would it take to spend one mole of dollars?

If you have 20L of nitrogen, and 25L of hydrogen, how many molecules of NH3 can you make? How much excess reactant is left over?

Which statement describes the trend in first ionization energy for elements on the periodic table? It generally decreases down a group because valence electrons are farther from the nucleus.

How many grams are in two moles of kIc

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?

The properties of elements are arranged by ... A. mass numbers B. atomic masses C. atomic radii D. atomic numbers