How much cesium (half-life = 2 years) would remain from a 10 g sample after 2 years?

How many molecules of molecular oxygen react with four molecules of NH3 to form four molecules of nitrogen monoxide and six molecules of water?

Why does rust differ from iron and oxygen

The law of segregation increases genetic variation true or false

When you squeeze an air-filled balloon, what happens inside? A. There are more collisions of air molecules against the wall of the balloon. B. There are fewer collisions of air molecules against the wall of the balloon. C.

Two 20.0-g ice cubes at - 20.0 °c are placed into 205 g of water at 25.0 °c. assuming no energy is transferred to or from the surroundings, calculate the final temperature, tf, of the water after all the ice melts.

The three major groups p On the periodic table are the

Which of the following has the greatest mass, in grams? a. 1 atom of lead (Pb) b. 0.5 mol copper (Cu) atoms c. 0.3 mol gold (Au) atoms d. 25 atoms of mercury (Hg)

Which one is not a sedimentery rock a.) sandstone b.) limestone c.) quartz d. (coal

Which group is more reactive than the alkaline earth metals?

Why do you not want any of the water on the outside of the test tube to drip off into the calorimeter?