How are acids and bases used by humans

Which of the following statements is FALSE? A. the n = 3 shell has no f subshell B. there are three p orbitals in every shell of an atom except the n = 1 shell C. all s orbitals have spherical shapes D. each d subshell has five d orbitals E.

Assuming there is not friction or air resistance, which of the following is true about total mechanical energy of a swinging pendulum?

Why are familiar objects such as pens and paper clips not commonly counted in moles?

A community needs more electrical energy. The community is located in an area with the following characteristics: • Average wind speed of 5 to 10 mph • One small river with slow currents • Dry, sunny conditions most of the year • No coal or oil

What existed originally that bacame the deposits of fossil fuels? A. vast amounts of plant life that existed before dinosaurs B. plants that died a few thousand years ago C. the dinosaurs D. lots of tiny mammals from the time before dinosaurs

At what temperature would the volume of a gas be 0.550 L if it had a volume of 0.432 L at - 20.0 o C?

A sample of a compound contains 9.11 g Ni and 5.89 g F. What is the empirical formula of this compound? A.) NiF B.) Ni3F2 C.) NiF2

Combining aqueous solutions of bai2 and na2so4 affords a precipitate of baso4. Which ions are spectator ions in the reaction?

Which kind of wave increases in height due to strong winds?

Solid lead IV oxide decomposes into solid lead and oxygen gas.