An isotope of Luckycharmium has a half-life of 120 days. How many days will have passed when 50% of a Luckycharmium sample remains?

List four observations that indicate that a chemical reaction may be taking place

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

When an experimenter draws a conclusion that he assumes will apply to all situations set up similarly to his test situation, even though he cannot possibly have examined all possible test scenarios, the experimenter is using deductive reasoning inductive reasoning abductive reasoning subjective reasoning