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1. How many grams of bromine are needed to react with 69.4 g of lithium to produce lithium bromide? 2 Li(s) + Br2(l) ?? 2 LiBr(s) 2. According to the following equation, how many grams of carbon are produced by the complete decomposition of 50.0 g of sucrose? C12H22O11(s) ?? 11 H2O(g) + 12 C(s) 3. In the equation below, how many grams of nitrogen monoxide are produced from the reaction of 0.25 mol of copper with excess nitric acid? 3 Cu(s) + 8 HNO3(aq) ?? 3 Cu(NO3)2(aq) + 4 H2O(l) + 2 NO(g) 4. Potassium chlorate will decompose when heated to form two products, one of which is oxygen gas. The other is a solid that remains in the test tube. mass of empty test tube 13.85 g mass of test tube and potassium chlorate 38.85 g mass of test tube and final product 29.44 g a. Write the balanced equation for the reaction. b. What mass of potassium chlorate reacted? (Assume all the available potassium chlorate reacted.) c. What is the actual yield of oxygen? d. Determine the theoretical yield of oxygen. e. Calculate the percent error. 5. Copper reacts with aqueous silver nitrate to produce silver metal. The following data were collected: initial mass of copper 1.76 g final mass of copper 1.12 g mass of filter paper 0.91 g mass of filter paper plus silver 3.12 g a. Write the balanced equation for the reaction. b. What mass of copper reacted? c. Calculate the theoretical yield of silver. d. What was the actual mass of silver produced? e. Calculate the percent error for the yield. 1. When producing gasoline (assume C8H18) from coal (assume pure carbon) and hydrogen gas, what mass of coal will react with 50.0 kmol of hydrogen? 2. How many moles of chlorine gas are required to produce 1.000 kg of laundry bleach (CaOCl2(s) or Ca(OCl)2 ? CaCl2(s)) from solid lime and chlorine? (Lime is calcium oxide). 3. What mass of lye (NaOH) can be produced from the reaction of 148 g of slaked lime (Ca(OH)2(s)) reacting with sufficient soda ash (Na2CO3(s))? 4. When a copper strip is added to concentrated nitric acid, a brown poisonous gas is evolved. Determine the number of moles of gas produced when 1.27 g of copper react. 1 Cu(s) + 4 HNO3(aq) ___ Cu(NO3)¬2(aq) + ___ H2O(l) + ___ NO2(g) 5. What mass of liquid hydrogen is required to react with 5.00 kg of liquid oxygen in a Saturn rocket? 6. What mass of gypsum crystals ("set" plaster of Paris, CaSO4 ? 2H2O) can be prepared from 29.04 g of plaster of Paris (CaSO4)2 ? H2O)? (CaSO4)2 ? H2O(s) + 3 H2O(l) 2 CaSO4 ? 2H2O(s) (i.e. 2 {CaSO4 ? 2H2O}) Draw electron energy-level diagrams for: 11. Cl 12. Ca2+ 13. Determine the number of moles of sucrose molecules in 100 g of sugar in a bowl. For each of the following stoichiometric problems, write the balanced chemical equation showing all states of matter, and report the answer to the correct number of significant digits. 14. In 1937, the Hindenberg, a hydrogen-filled dirigible, exploded as the hydrogen gas reacted violently with oxygen. What mass of product would be produced if 250 kg of hydrogen reacted? 15. Milk of magnesia, containing magnesium hydroxide, can be taken to relieve the burning sensation produced by excess stomach acid, hydrochloric acid. What mass of magnesium hydroxide is necessary to react completely with 0.200 mol of hydrochloric acid? 16. Acetylene, C2H2(g), is a very useful hydrocarbon often used as a fuel for welders' torches. What mass of liquefied oxygen is required to react with 7.00 g of liquefied acetylene?
What is the fraction of A remaining after 91.622 minutes if the first order rate constant is 2.687e-4 s-1
Compare the electrical conductibities of Sodium Chloride (NaCl), ammonium nitrate (NH4NO3), calcium sulfate (CaSO4), and distilled water. Account for any differences noted in the electrical conductivities of these compounds.
Iron has a body-centered cubic unit cell, and a density of 7.87 g/cm3. Calculate the edge length of the unit cell, in pm.
Calculate the number of grams of Mg needed for this reaction to release enough energy to increase the temperature of 73 mL of water from 29 deg. celcius to 75 deg. celcius.
a cylindrical vessel with rigid adiabatic walls is separated into 2 parts by a frictionless adiabatic piston. each part
Explain how is the pKa of a phenol different than an aliphatic alcohol. Can a phenol be deprotonated by 3 M NaOH, can aphenol be deprotonated by NaHCO3
Important information about Liquid Crystals, Are there differences between the cholesteryl benzoates and the cholesteryl esters having long carbon chains?
Describe reasons the paper's physical properties are different from the water's physical properties.
using the periodic table predict thr most stable ion for na mg al s cl k ca and ga. arrange these ions from largest to
The theoretical yeild of Ni(NH3)6Cl2 moles must be calculated as well as the theoretical yield of Ni(NH3)6Cl2 grams. How do you find the limiting reagent to calculate the theoretical yield.
How can I find the pH and volume (mL) of 0.0411M KOH needed to reach the equivalence point in the titration of 23.4mL 0.0390M HNO2? The question doesn't give me a Ka or Kb value.
Consider the reaction below. If you start with 7.00 moles of C3H8 (propane) and 7.00 moles of O2, how many moles of carbon dioxide can be produced. C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(g)
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