Two grams of an eight-gram radioactive substance are all that remains after ten minutes. what is the half-life (in minutes) of this substance? a. 2 b. 10 c. 1 d. 5

How do you tell if someone actually cares about you? and just say they do?

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units