All elements have four or more naturally occurring isotopes. 

Select the answer in which this equation is properly balanced: __ FeS + __ O₂ → __ Fe₂O₃ + __ SO₂

When fuel is burned in oxygen, the products are carbon dioxide and water. If 12 grams of water and [x] grams of carbon dioxide are produced from [y] grams of oxygen, how many grams of fuel must have burned?

What is the database that FDEP uses to manage records for waste management?

Which of the following is not a scenario where the soil underneath and surrounding a landfill could be contaminated?

Round the following number to 3 sig figs: 96.093    (Select the BEST answer choice)

Which of the following items is a chemical property?

In Florida, _____ terrain can cause the formation of sinkholes.

Hand sorting plays a minor role at C&D MRFS.

What is the correct formula for the molecular compound heptaphosphorus octafluoride? (numbers will be considered subscripts)