Presentation on theme: "MOLE DAY SONG MAKES SENSE NOW!"— Presentation transcript:
1MOLE DAY SONG MAKES SENSE NOW! STOICHIOMETRY REVIEWMOLE DAY SONG MAKES SENSE NOW!
210 PROBLEMS Solve each problem together as a group Write your work on notebook paper, one set of solutions per groupRotate writing duties for each problemWrite your answer on the white boardUse correct units and sig digsBe prepared to show your workAny person in any group could be asked to explain and show work, so be sure you all know what is going on!
31A bike manufacturer has 5350 wheels, 3023 frames, and 2655 handlebars. How many bikes can be manufactured from these parts?2 wheels + 1 frame + 1 handlebar 1 bike
42 The alcohol in “gasahol” burns according to the following equation. C2H5OH +3O2 2CO H2OHow many moles of CO2 are produced when 3.00 moles of C2H5OH is burned?
53CO2 exhaled by astronauts is removed from the spaceship atmosphere by reaction with KOH.CO2 +2KOH K2CO3 + H2OHow many kg of CO2 can be removed by 1.00 kg KOH?
64The limiting reactant in a completed chemical reaction is the substanceA. Left overB. Used upC. With the least mass before the reactionD. With the most mass before the reaction
75Nitrogen reacts with hydrogen to yield NH3…and this reaction made Germany a force to be reckoned with in WW II because it enabled them to make lots of explosives!N2 + 3H2 2NH3What volume of H2 is required to react with 3.00 L of N2 at STPWhat volume of NH3 will be produced?
86The fermentation of glucose C6H12O6 produces ethyl alcohol, C2H5OH, and CO2C6H12O6 2C2H5OH + 2CO2How many grams of ethyl alcohol can be produced from 10.0 g glucose
97 Octane burns according to the following equation 2C8H O2 16CO H2OHow many grams of CO2 are produced when 5.00 g of octane is burned?
108 Crude iron is produced from iron ore in the following reaction Fe2SO CO 2Fe +3CO2How many moles of iron are produced from 10. moles of Fe2O3 and 25 mol CO?
119Automotive airbags inflate when sodium azide rapidly decomposes to sodium and N2 via this reaction2NaN3 2Na N2How many grams of sodium azide are required to form g of N2 gas?How many liters of N2 is this at STP?
1210 Water is made from H2 and O2. Write the balanced chemical equation. If we start with 4.6 mole H2 and 3.1 mol O2,how many moles of H2O are produced?What is the excess reactant?How many moles of the excess reactant are left over?
13Answersbikes mol CO kg 4. used up L H L NH g ethanol g CO mol Fe g NaN L N mol H2O .8 mol O2 in excess