A radioactive element is one that is:

a. stable

b. not stable

c. found in all living organisms

d. both b & c

Mass can be measured in which of the following? grams, meters, liters, both A and B

Why should you pay attention to the physical states of reactants and products when writing elquilibrium constant expressions?

If there is a loss of 5.63 x 10-7kg of mass in a nuclear reaction, how many Joules of energy would be released? Recall that c = 3x108 m/s 3.92 x 104 3.92 x 1010 5.07 x 107 5.07 x 1010 6.26 x 10-24

A 0.821 gram sample of pure NH F was treated with 25.0 mL of 1.00 M NaOH and heated to drive off the NH3. How many milliliters of 0.500 M HCl are needed for the back titration?

Which kind of atoms would typically form an ionic bond?

A population of crabs live on a light-colored sandy beach. In this environment there is a population of birds that eat the crabs. One year, there is a volcanic eruption near the beach and dark volcanic ash covers the beach.

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.