This isotope is used for diagnostic imaging of the thyroid. It has a half-life of 13 hours. If 80.0 mg of this isotope were prepared at 4:00 a. m. on Monday, how many mg remain at 6:00a. m. on the following day (Tuesday)?

Non renewable resources like petroleum eventually

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Geothermal energy for industrial use is available almost anywhere. a.true b.false