For the reaction below, calculate the number of moles of oxygen needed to produce 13.55 mol of iron(III) oxide. Round your answer to one decimal. 4FeS + 7 O (exponent 2) > 4 SO(exponent 2) + 2 Fe(exponent2) O (exponent 3)

Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

What is the mass of phosphorous in a 51-kg person