Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- Balance the equation below and determine the mass in grams of N₂ needed to produce 11.35 g of NH3. _H₂ + N₂NH3 bor of significant figures in scientific notation (Use E notation and only 1 digit before decimal o g. 2.5E5 for 2.arrow_forwardBalance the following chemical equation:__NH3 + __O2 = __NO + __H2Oarrow_forwardBalance the following chemical equation and determine the number of moles of Fe(s) produced when 1 moles of Fe203(s) react with excess C(s) to produce Fe(s) and CO2(g). Fe203(s) + C(s) → Fe(s) + CO2(g) O Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 105)arrow_forward
- Combustion analysis of a 2.50 g sample of a compound containing only carbon, hydrogen and nitrogen produces 7.09 g of CO2 and 1.69 g of H₂O. Calculate the empirical formula of the compound (CxHyNz). A/ 신 You do not need to put 1's in the formula. You do not need to subscript numbers in the formula. For example, H₂O would be written as H2O.arrow_forwardEthanol (C2H5OH) and oxygen gas (O2) react to form carbon dioxide (CO2) and water (H20): C2H5OH(1) + 302(g) → 2CO2(g) + 3H20(g) What can be concluded from the chemical equation?arrow_forwardAqueous hydrobromic acid HBr reacts with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O . If 1.82g of water is produced from the reaction of 15.4g of hydrobromic acid and 10.0g of sodium hydroxide, calculate the percent yield of water. Be sure your answer has the correct number of significant digits in it.arrow_forward
- Enter an equation for the formation of Cr2O3(s)Cr2O3(s) from its elements in their standard states.arrow_forwardgiven the following equation 2 Co2O3(s) + 3 C(s) --> 4 Co(s) + 3 CO2(g) indicate the coefficient for elemental carbon 6 4 1 3 or 2arrow_forwardPolyethylene is a hydrocarbon polymer used to produce food -storage bags and many other flexible plastic items. A combustion analysis of a 1.26-g sample of polyethylene yields 3.94 g of C*O_{2} and 1.61 g of H_{2} * O What is the empirical formula of polyethylene ? Write numbers only to 3 significant figures (no units) and for numbers < 1 include a "" before the decimal point .arrow_forward
- An important reaction that takes place in a blast furnace during the production of iron is the formation of iron metal and CO2from Fe2O3 and CO. A.)Find the mass of Fe2O3 required to form 8.50×102kg of iron. Express your answer with the appropriate units. B.)Find the mass of CO2 that forms in this process. Express your answer with the appropriate units.arrow_forward2. 5.88 g of hydrated calcium chloride CaCl,•xH,O is treated with excess K2SO4 in a double replacement reaction to yield 5.44 g anhydrous CaSO4 after heating. a) Write down the balanced double replacement reaction. (Refer to question 1a.) b) Calculate the number of moles of anhydrous CaSO4 produced. c) Calculate the number of moles of CaCl,•XH2O used. d) Calculate the molar mass of CaCl2•xH2O. e) Determine the value of x in CaCl,*XH2O.arrow_forwardCrime scene investigators keep a wide variety of compounds on hand to help with identifying unknown substances they find in the course of their duties. One such investigator, while reorganizing their shelves, has mixed up several small vials and is unsure about the identity of a certain powder. Elemental analysis of the compound reveals that it is 67.31 % carbon, 6.978% hydrogen, 4.617% nitrogen, and 21.10% oxygen by mass. Which of the compounds could the powder be? C17H19NO3C17H19NO3 = morphine, analgesic C17H21NO4C17H21NO4 = cocaine, illicit drug C7H5N3O6C7H5N3O6 = 2,4,6-trinitrotoluene (TNT), commonly used explosive C10H15NC10H15N = methamphetamine, stimulant C4H5N2OC4H5N2O = caffeine, stimulant C11H15NO2C11H15NO2 = 3,4-methylenedioxymethamphetamine (MDMA), illicit drug C21H23NO5C21H23NO5 = heroin, illicit drug C3H6NO3C3H6NO3 = hexamethylene triperoxide diamine (HMTD), commonly used explosivearrow_forward
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