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

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.