A random radioisotope has a decay constant of 0.00238 years-1. If 1165 years have past, and there was originally 80 grams of it,
roughly how many grams of the original radioisotope remain?

Balance this equation: n2 + h2 > nh3, write the following molar ratios: n2 / n2 / nh3 h2 /

Select the correct answer. given: 2libr + ba → babr2 + 2li in this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced? a. 1.18 mol b. 2.37 mol c. 4.73 mol d. 16.4 mol e. 32.9 mol

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo