20:11Stoichiometry - Limiting & Excess Reactant, Theoretical & Percent Yield - ChemistryThe Organic Chemistry Tutor809views1rank
25:16Stoichiometry Basic Introduction, Mole to Mole, Grams to Grams, Mole Ratio Practice ProblemsThe Organic Chemistry Tutor1101views
Multiple ChoiceAmmonium nitrate (NH4NO3), a common fertilizer, is 35.0% nitrogen by mass. How much ammonium nitrate contains 1.25 kg of nitrogen?643views
Multiple ChoiceZeatin, a plant hormone, is known to have 5 nitrogen atoms in every molecule. Nitrogen makes up 33.8% of the mass of the molecule. What is the mass of one molecule in amu?324views
Multiple ChoiceIf a match contained 1.00 g of P, how much P4O10 would form if the following equation was obeyed? ___ KClO3 + ___ P → 10 KCl + ___ P4O10338views
Multiple ChoiceIn order to calculate the mass of a product in a chemical reaction from the number of moles of a reactant, which of the following describes all the conversion factors needed?1348views
Multiple ChoiceIn the following equation how many moles of aluminum chloride are produced from 2.50 mol of hydrochloric acid? 2 Al (s) + 6 HCl(aq) → 2 AlCl3 (aq) + 3 H2 (g)494views1rank
Multiple ChoiceWhen heated, potassium chlorate decomposes to potassium chloride and molecular oxygen: 2 KClO3 → 2 KCl + 3 O2 How much oxygen could be formed from 5.0 g of potassium chlorate?1354views
Multiple ChoiceThe combination reaction for the formation of hydrazine is shown below:4 NH3 (g) + N2 (g) → 3 N2H4 (l)Determine the number of moles of hydrazine formed when 25.7 g ammonia reacts with excess nitrogen gas.373views8rank1comments
Multiple ChoiceThe reaction between solid phosphorus and fluorine is given below:P4 (s) + 12 F2 (g) → 4 PF6 (aq)If 6.92 x 10-5 molecules of solid phosphorus react to completion, how many grams of phosphorus hexafluoride would be produced?369views5rank3comments
Multiple ChoiceDetermine the density of 50.0 mL iron (II) bromide when the following chemical reaction produced 112.7 g iron (II) phosphate.2 K3PO4 (aq) + 3 FeBr2 (aq) → Fe3(PO4)2 (s) + 6 KBr (aq)330views4rank
Open QuestionHow many moles of nitrogen are needed to completely convert 6.34 mol of hydrogen?334views
Open QuestionHow many chlorine atoms are on the products side of the reaction 2Al + 6HCl ‚Üí 2AlCl3 + 3H2? 2 3 6 9323views
Open QuestionWhat mass of silver oxide, Ag2O, is required to produce 25.0 g of silver sulfadiazine, AgC10H9N4SO2, from the reaction of silver oxide and sulfadiazine?314views
Open QuestionThe coefficients in a balanced chemical equation always can express the ratio of404views
Open QuestionAmmonia NH3 chemically reacts with oxygen gas O2 to produce nitric oxide NO and water H2O.261views
Open QuestionGiven 6.000 moles of aluminum (Al), how many grams of aluminum oxide (Al2O3) will be produced?233views
Open QuestionThe molar mass of O2 is 32.0 g/mol. What mass, in grams, of O2 must react to form 3.80 mol of Al2O3?521views
Open QuestionHow many moles of copper must react to form 3.50 mol of Ag? 0.175 mol 1.75 mol 7.00 mol 17.0 mol228views
Open QuestionCalculate the number of grams of oxygen required to convert 63.0 g of glucose to CO2 and H2O.264views
Open QuestionWhat are the mole ratios of hydrazine (N2H4) to hydrogen peroxide (H2O2) and hydrazine to water?197views
Open QuestionHow many moles of oxygen (O2) are required to react completely with 1.67 mol H2?342views
Open QuestionHow many moles of CO2 are produced when 5.80 mol of ethane are burned in an excess of oxygen?330views
Open QuestionWhat mass of NaCl can be produced by the reaction of 5.0 mol Cl2? 2 Na + Cl2 --> 2 NaCl234views
Open QuestionIf you produced 5 moles of Ca3(PO4)2, how many moles of NaCl did you also produce?211views
Open QuestionConsider the unbalanced equation for the combustion of hexane: C6H14(g) + O2(g) → CO2(g) + H2O(g). Balance the equation and determine how many moles of O2 are required to react completely with 7.2 moles of C6H14.
Open QuestionCalculate how many moles of NO2 form when each quantity of reactant completely reacts. Reaction: 2 N2O5(g) → 4 NO2(g) + O2(g) a. 15.2 g N2O5 b. 6.8 mol N2O5 c. 2.87 kg N2O5
Open QuestionCalculate how many moles of NH3 form when each quantity of reactant completely reacts. 3 N2H4(l) → 4 NH3(g) + N2(g), given the following reactant quantities: a. 2.6 mol N2H4, b. 3.55 mol N2H4, c. 4.88 kg N2H4.
Open QuestionConsider the balanced equation: 2 N2H4(g) + N2O4(g) → 3 N2(g) + 4 H2O(g). Complete the table showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the other reactant, as well as the moles of each product that forms. If the number of moles of a product is provided, fill in the required amount of each reactant to make that amount of product, as well as the amount of the other product that forms. Mol N2H4 Mol N2O4 Mol N2 Mol H2O 2 _____ _____ _____ _____ 5 _____ _____ _____ _____ _____ 10 _____ _____ 11.8 _____ 2.5 _____ _____ _____ _____ 4.2 _____ _____
Open QuestionFor each of the reactions, calculate the mass (in grams) of the product that forms when 3.67 g of the underlined reactant completely reacts. Assume that there is more than enough of the other reactant. a. Ba(s) + Cl2(g) → BaCl2(s) b. CaO(s) + CO2(g) → CaCO3(s) c. 2 Mg(s) + O2(g) → 2 MgO(s) d. 4 Al(s) + 3 O2(g) → 2 Al2O3(s)
Open QuestionFor each precipitation reaction, calculate how many grams of the first reactant are necessary to completely react with 55.8 g of the second reactant. a. 2 KI(aq) + Pb(NO3)2(aq) → PbI2(s) + 2 KNO3(aq) b. Na2CO3(aq) + CuCl2(aq) → CuCO3(s) + 2 NaCl(aq) c. K2SO4(aq) + Sr(NO3)2(aq) → SrSO4(s) + 2 KNO3(aq)
Open QuestionPeople sometimes use sodium bicarbonate as an antacid to neutralize excess hydrochloric acid in an upset stomach. What mass of hydrochloric acid (in grams) can 2.5 g of sodium bicarbonate neutralize? (Hint: Begin by writing a balanced equation for the reaction between aqueous sodium bicarbonate and aqueous hydrochloric acid.)
Open QuestionToilet bowl cleaners often contain hydrochloric acid, which dissolves the calcium carbonate deposits that accumulate within a toilet bowl. What mass of calcium carbonate (in grams) can be dissolved by 3.8 g of HCl? (Hint: Begin by writing a balanced equation for the reaction between hydrochloric acid and calcium carbonate.)
Open QuestionThe citizens of the world burn the fossil fuel equivalent of 7 * 10^12 kg of petroleum per year. Assume that all of this petroleum is in the form of octane (C8H18) and calculate how much CO2 (in kg) the world produces from fossil fuel combustion per year. (Hint: Begin by writing a balanced equation for the combustion of octane.) If the atmosphere currently contains approximately 3 * 10^15 kg of CO2, how long will it take for the world’s fossil fuel combustion to double the amount of atmospheric carbon dioxide?
Open QuestionWhat is the minimum amount of hydrogen gas, in grams, required to completely hydrogenate 15.5 kg of 2-butene?
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