How many milligrams of the radioisotope are still active
Fluorine-18, which has a half-life of 110min, is used in PET scans.If 105mg of fluorine-18 is shipped at 8:00 A.M., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 P.M. ?
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The reaction of 7.3 grams of fluorine with excess chlorine produced 4.9 grams of ClF3. What percent yield of ClF3 was obtained?
An auto mechanic spills 85 mL of 2.6 M H2SO4 solution from a rebuilt auto battery. How many milliliters of 2.5 M NaHCO3 must be poured on te spill to react completely with the sulfuric acid?
How many grams of methane must be combusted to heat 1.30 kg of water from 26.0 C to 93.0C, assuming H2O as a product and 100% efficiency in heat transfer?
A sample of propane, rm C_3H_8, contains 17.5 moles of carbon atoms. How many total moles of atoms does the sample contain?
If the slide contains a 2.4 cm high object, what is the height of the image of the object?
Three major approaches to thinking about business ethics are the conventional approach, the principles approach, and the ethical tests approach. Which of the following describes the principles approach?
A container has a mass of 73.91 g when empty and 91.44 g when filled with water. The density of water is 1.0000 g/cm3. (a) Calculate the volume of the container. (b) When filled with an unknown liquid, the container had a mass of 88.42 g. Calculat
A 6.11 g sample of Cu---Zn alloy reacts with excess aqueous HCl producing 1.26 L of H2(g) at 22.0 degrees C and 728 torr. Since only the Zn portion of the alloy reacts, calculate the percent Cu in the alloy.
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