Barium-142 is used as a GI radiocontrast agent. After 1.25 hours, 9.25 μg remains in the patient. Determine the original dose given the half-life of Ba-142 is 10.6 minutes.

The answer is about 1184 or 1180

What happens to the number of valence electrons when a metal element forms a compound?

Which one of the following chemicals does the body generate during regular exercise? A. Adrenaline B. Endorphin C. Sodium chloride D. Estrogen

As stated in the text convincing examples that demonstrate the law of conservation of matter outside of the laboratory are few and far between.

What does the kinetic theory say about the kinetic energy present in solids

What conditions favor the formation of ionic compounds from elements? both atoms must be non metals. you must have a metal and a nonmetal. both atoms must be metals. you must have a metal atom and a halogen?

What is the basic definition of carbohydrates

1. Describe a few of the properties of ozone and compare these to the properties of diatomic oxygen.

elect the false statement. Which of the given statements is not a reason why reactions are performed under reflux? Refluxing allows thermally unstable reactants to react faster without decomposition. Refluxing prevents the loss of solvent.

Nature operates the same way everywhere in the universe except where we have evidence True Or False

Toluene (C7H8) and nitric acid (HNO3) are used in the production of trinitrotoluene (TNT, C7H5N3O6), an explosive.