An isotope has a half life of 5 minutes. How much of a 100 gram sample of this isotope is left after 20 minutes?

Label a-f based on the table using c for concentrated and d for dilute

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: