Presentation on theme: "Station One Determine the number of moles in 62.8g of barium acetate."— Presentation transcript:
1Station OneDetermine the number of moles in 62.8g of barium acetate.
2Station TwoHow many formula units are in a 61.8 g sample of potassium phosphite?
3Station ThreeDetermine the number of atoms of nitrogen in 14.8 g of ammonium nitrate.
4Station FourGive the empirical formula of the compound C34H68O12.
5Station FiveFind the mass of a sample of C6H6 gas that occupies 56.3 L at STP.
6Station SixAt STP, a container is found to contain 54.2 L of CO2. How many moles of carbon dioxide are in the container?
7Station SevenDetermine the mass in grams of 3.45x10-3 moles of titanium.
8Station EightWhat mass of calcium metal contains the same number of atoms as 12.16g of magnesium?
9Station NineCalculate the number of molecules present in 2.62x10-6 grams of water.
10Station TenCalculate the number of atoms of Fe in 151 kg of Fe.
11Station ElevenCalculate the percentage of cation in ammonium chloride.
12Station TwelveWhich of the following pairs of compounds have the same empirical formula?C2H2 and C6H6C2H6 and C4H10NO2 and N2O4C12H10O and C6H5OH
13Station ThirteenA compound is known to have a molar mass of g/mol. Find the molecular formula of the compound, given the results of analysis of a 310.8g sample that revealed that the sample contains only boron and iodine. The mass of the iodine in the sample is found to be 302.2g.
14Station FourteenDetermine the empirical formula of a compound containing 2.16g of Al, 3.85g of S, and 7.68g of O.
15Station FifteenOctane, a compound of hydrogen and carbon, has a molar mass of g/mol. If one mole of the compound contains 18.17g of hydrogen, what is the molecular formula?
16Station SixteenFind the percentage composition of a compound that contains 1.51g of chromium, 1.13g of K, and 1.62g of O, in a 4.26g sample of the compound.
17Station SeventeenA compound having an approximate molar mass of g has the following percentage composition by mass: carbon, 42.87%, hydrogen, 3.598%, oxygen, 28.55%, and nitrogen. Determine the empirical and molecular formulas of the compound.
18Station EighteenThe compound A2O is 63.7% A (a mystery element) and 36.3% oxygen. What is the identify of element A?
19Station NineteenA compound with the empirical formula CH2O was found to have a molar mass between 89 and 91g. What is the molecular formula of the compound?
20Station TwentyCalculate the percent by mass of caffeine, C8H10N4O2.
21Station Twenty-OneIf cobalt metal is mixed with excess sulfur and heated strongly, a sulfide compound is produced that contains 55.06% cobalt by mass. Calculate the empirical formula of the sulfide compound.
22Station Twenty-TwoCalculate the number of O atoms in 4.5L of carbon dioxide.
23Station Twenty-ThreeGive the percent composition of sodium dichromate.
24Station Twenty-FourCalculate the mass of 0.75 mol of lithium acetate.
25Station 25Which weighs more mol of oxygen atoms or 4 mol of hydrogen atoms?0.5 mol O2 ( 32 g ) = 16 g O21 mol4 mol H2 ( 2 g ) = 8 g H2
26Station 26What mass of cobalt contains the same number of atoms as 57 g of fluorine?57 g F2 ( 1 mol F2 ) =38 g F2
27Station 27Consider a 20.0 g sample of silver metal and a 20.0 g sample of another mystery metal. You are told there are exactly 4 times as many atoms of the mystery metal as of silver metal. Identify the mystery metal.
28Station 28A single molecule of a particular compound has a mass of 4.65 x 10-23g. Which of the following could be this compound?CO H2O NO2 NH3
29Station 29Calculate the number of grams of iron that contain the same number of atoms as 2.24 g of cobalt.
30Station 30Consider a 5.0 gram sample of nickel and a 6.0 gram sample of an unknown metal. There are exactly 1/2 as many atoms of the unknown as in the 5.0 gram sample of Ni. What is the unknown metal?