A radioisotope used for diagnosis must emit gamma rays of sufficient energy to escape from the body and it must have a half-life short enough for it to decay away soon after imaging is completed.

TRUE

FALSE

How many moles of helium are contained in a 2.5L vessel at 300K under a pressure of 5.35atm?

From what group must the terminal atoms come in an abx molecule where the central atom is from group 6a, for the electron-domain geometry to both be trigonal planar

The volume of a gas increases when its temperature increases because

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What should Molly do to treat her burn?

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You have two separate containers each filled with a gas. The containers have the same volume and are at the same temperature. The gases also exert the same pressure. Which of the following statements are true? a.

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A radioisotope used for diagnosis must emit gamma rays of sufficient energy to escape from the body and it must have a half-life short enough for it to decay away soon after imaging is completed. TRUE FALSE