calculate the mass of iron sulfide, which is formed by the interaction of 11.2 g of iron and 9.6 g of sulfur according to the equation: Fe + S = FeS​

How can the periodic table be used to predict the behavior of elements?

If a sample of radioactive isotopes takes 600 minutes to decay from 400 grams to 50 grams, what is the half-life of the isotope?

Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.