Describe a situation when a lever has potential energy?

Nitrogen is a non-metal

Half-life problems: (a) Hg-197 has a half-life of 64 hours. If you have 164g of Hg-197 today, how much will you have in 448 hours? (b) 263 minutes ago we had 5.12g of I-134 and now we only have 0.16g.

A measure of the internal energy that has been absorbed or transferred from one body to another is

Name 6 measurable properties of weather and climate

What is a metalloid?

For the reaction represented by the equation 2na + cl2® 2nacl, how many grams of chlorine gas are required to react completely with 2.00 mol of sodium?

Transuranium elements are elements larger than uranium that are produced via transmutation. a. True b. False

Explain why glacial deposits have been found in Africa?

Which of the following would result in butyl phenyl ether as the major product? a. Reaction of phenoxide with 1-bromobutane b. Reaction of 1-butanol with bromobenzene c. Reaction of phenyl magnesium bromide with 1-butanol d.

A 200-gram sample of a radioactive nuclide is left to decay for 60 hours. At the end of 60 hours, only 25 grams of the sample is left. What is the half-life of the nuclide sample? 60 hours 30 hours 40 hours 20 hours - - - > I think 20?