When this equation is balanced, using the smallest whole number coefficients, what is the coefficient for O2? ___ FeS2 + ___ O2 ___ SO2 + ___ Fe2O3

How many moles of KBrO3 are required to prepare 0.0700 moles of Br2 according to the reaction: KBrO3 + 5KBr + 6HNO3 6KNO3 + 3Br2 + 3H2O

Which of the following statements is FALSE for the chemical equation given below in which nitrogen gas reacts with hydrogen gas to form ammonia gas assuming the reaction goes to completion? N2 + 3H2 2NH3

CaO + 3C CaC2 + CO What is the amount of CaC2 which can theoretically be produced from the reaction of excess calcium oxide and 10.2 g of carbon?

Calculate the mass of hydrogen formed when 25 grams of aluminum reacts with excess hydrochloric acid. 2Al + 6HCl Al2Cl6 + 3H2

The limiting reagent in a chemical reaction is one that:

If 5.0 g of each reactant were used for the the following process, the limiting reactant would be: 2KMnO4 +5Hg2Cl2 + 16HCl 10HgCl2 + 2MnCl2 + 2KCl + 8H2O

. The reaction of 7.8 g benzene, C6H6, with excess HNO3 resulted in 0.90 g of H2O. What is the percentage yield? Molar Mass (g/mol): C6H6=78 HNO3=63 C6H5NO2=123 H2O=18 C6H6 + HNO3 → C6H5NO2 + H2O

Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?

The coefficients in a chemical equation represent the

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