Need !

which of the following is true about the concept of half-life?

a. half-life measures the rate of decay of a radioisotope.

b. the shorter the half-life, the more dangerous the radioisotope.

c. half-life predicts which atoms in a radioactive sample will decay.

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

What is the value of keq for the reaction expressed in scientific notation

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?