The quantity, q grams, of the radioactive isotope strontium-90 present in a sample decreases by half over a period of about t = 28.8 years. if a sample initially contains 3 grams of strontium-90, what equation represents the relationship between q and t?

Which substances have the lowest melting points: ionic covalent, or metallic

In an effort to address concerns about global warming, a power plant in portland,oregon is designed to take all of its exhaust gases from its boilers and recycle the co2 using the solvay process to make sodium hydrogen carbonate. the reaction is shown below. nh3(g) + h2o(l) + co2(g) + nacl(aq) → nahco3(aq) + nh4cl(aq) how many liters each of nh3 and co2 (both at stp) would be consumed to produce 3.00 kg of sodium bicarbonate? the volume of both nh3 and co2 would be

4. absorption has the highest risk of overdose due to increased potency. a. rectal b. oral c. transdermal d. intranasal