39 is two fifths of what number

Why does every chemical reaction require a certain amount of activation energy? Ο Α. Energy is released when the reactants begin to react. OB Energy lost to the environment during the reaction must be replaced. O c.

In which device is chemical energy transformed into electrical energy? A battery B hair dryer C television D hydroelectric plant

Habitat loss due to the increasing human population has caused A. the number of extinctions to decrease B. reductions in endangered species C. increased biodiversity D. decreased biodiversity

Lead β is a solid phase of lead still unknown to science. The only difference between it and ordinary lead is that Lead β forms a crystal with a bcc unit cell and a lattice constant (7-404. pm).

The volume of a balloon containing an ideal gas is 3.78 l at 1.05 atm pressure. what would the volume be at 2.75 atm with constant temperature and molar amount

How does the motion of particles in the sun's plasma compare to the motion of particles in a solid? particles in both the plasma and a solid move around to fill available space.

What is the molarity of a solution containing 45.78gMgCl2 dissolved in 3.00L of solution?

What kind of wavelength do television signals have? a. Short c. Long b. Intermediate d. Very rapid

What gene is responsible for tumor suppression? A. beta - galactoside B. p53 C. alpha goblin D. beta goblin

How does ur body maintain constant tempature on a hot day?