A piece of charcoal is found to contain 30% of the carbon 14 that it originally

had. When did the tree die from which the

charcoal came? use 5600 years as the

half-life of carbon 14.

A) 9709.46

B) 9708.33

C) 9708.34

D) 9709.45

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa

Chris is about to do an experiment to measure the density of water at several temperatures. his teacher has him prepare and sign a safety contract before beginning the experiment. which term is mostlikely part of the safety contract

Describe the process that was used in this lab to create magnesium oxide, specifically identifying the type of chemical reaction. explain why the product had a higher mass than the reactant, and how this relates to conservation of matter.