Chemistry, 18.10.2019 21:50, DerikF9478
Radioactive isotopes are used as contrast dyes to study soft tissues such as the gastrointestinal tract. the radiocontrast dyes are considered safe because the isotopes have short half-lives and the isotopes coat the gi tract and are not absorbed by normal tissue. if a patient ingests 7.50 mg of barium sulfate, how long until the barium-141 is 99% out of the patient's system if the half-life barium-141 is 18.27 minutes?
Answers: 3
Chemistry, 22.06.2019 00:30, lasagnafoe
Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?
Answers: 2
Chemistry, 22.06.2019 03:40, 19thomasar
Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)
Answers: 3
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