A 7.50 g sample of pyrite (Fesz) contains 3.49 g of tron. What are the percentages of Iron and sulfur in pyrite (also known as "Fool's Gold" because of its golden color)?​

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Which statement best explains the relationship between an area is geography and the temperature of its surface water

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?