REVIEW ACS III
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A compound is found to consist of 28.1% sodium, 13.2% boron and 58.7% oxygen. What is its simplest formula? Select one:
Which of these compounds contains the greatest mass percentage of nitrogen? Select one:
What mass of carbon is present in 0.500 mol of phenol (C6H5OH)? Select one:
A 4.000 g sample of an unknown metal, M, was completely burned in excess O2 to yield 0.02225 mol of the metal oxide, M2O3. What is the metal? Select one:
What is the maximum mass in grams of aluminum chloride that could be obtained from 2.50 mol of barium chloride and excess aluminum sulfate? This is the balanced equation for the reaction: Al2(SO4)3 + 3BaCl2–> 3BaSO4 + 2AlCl3. BaCl2 molar mass is 208.3 g/mol and AlCl3molar mass is 133.3 g/mol. Select one:
A sample of a compound of xenon and fluorine contains molecules of a single type; XeFn, where n is a whole number. If 5.0 x 1020 of these XeFn molecules have a mass of 0.172 g, what is the value of n? Select one:
1.0 x 10-5 g sample of a compound is known to contain 1.36 x 1017 molecules. This compound is Select one:
1.438 g sample of a compound of nitrogen and oxygen contains 1.000 g of oxygen. What is the empirical formula? Select one:
The limiting reagent in a particular reaction can be recognized because it is the reagent that Select one:
Consider this reaction used for the production of lead. What is the maximum mass of lead that can be obtained by the reaction of 58.0 g PbO and 30.0 g ofPbS? Select one:
What volume of 0.20 M BaCl2 is required to react completely with 25.0 mL of 0.600 M Na2SO4? This is the net ionic equation for the reaction: Select one: