ce started,ne: 57 minutes, 35 seconds.Completion Status:A Moving to another question will save this response.Question 16Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas:Mg(s) + 2 HCl(aq)MgCl2(aq) + H2(g)Suppose you need hydrogen to fill a balloon and you have 0.800 mol of magnesium and 2.00 moles of hydrochloric acid. How much hydrogen can yougenerate if the above reaction goes to completion?6.00 moles2.00 moles0.400 moles4.00 moles0.800 moles1.00 mole6:38 PM3/26/2020P Type here to searchhpendhomeinsprt scdelete(12f9 144f8f7f6numf5backspacelock&L.8.{'pause

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World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter9: Chemical Quantities

Section9.2: Using Chemical Equations To Calculate Mass

Problem 4RQ

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58 Magnesium will burn in air to form both Mg3N2 and MgO. What mass of each product would be found if burning a 3.11-g sample of magnesium to completion produces a combined total of 5.09 g of the two products?
Magnesium ribbon reacts with acid to produce hydro- gen gas and magnesium ions. Different masses of magnesium ribbon are added to 10 mL of the acid. The volume of the hydrogen gas obtained is a measure of the number of moles of hydrogen produced by the reaction. Various measurements are given in the table below. (a) Draw a graph of the results by plotting the mass of Mg versus the volume of the hydrogen gas. (b) What is the limiting reactant in experiment 1? (c) What is the limiting reactant in experiment 3? (d) What is the limiting reactant in experiment 6? (e) Which experiment uses stoichiometric amounts of each reactant? (f) What volume of gas would be obtained if 0.300 g of Mg ribbon were used? If 0.010 g were used?
On January 28, 2014, in Germany, a barn containing 90 cows exploded when a stray spark caught the methane trapped in the building on fire. The building was damaged and one cow was slightly injured with minor burns. Assume that the 90 cows were producing 250L of methane per day and that there was a 15 hour collection in the barn when it ignited. __CH4 + __O2 → __ CO2 + __H2O a) How many liters of methane was in the barn when it exploded? b) What mass of water was generated in the explosion? (SET WORK INTO TRAIN TRACKS)
Soda ash (sodium carbonate) is widely used in the manufacture of glass. Prior to the environmental movement much of it was produced by the following reaction. CaCO3 + 2 NaCl → Na2CO3 + CaCl2 Unfortunately, the byproduct calcium chloride is of little use and was dumped into rivers, creating a pollution problem. As a result of the environmental movement, all of these plants closed. Assume that 125g of calcium carbonate (100.09 g/mol) and 125 g of sodium chloride (58.44 g/mol) are allowed to react. Determine how many grams of useful sodium carbonate (105.99 g/mol) will be produced. How many grams of useless calcium chloride (110.98 g/mol) will be produced? You should also determine how many grams of excess reactants are left (indicate which one is the limiting reactant)
A website promoting the use of alternative energy vehicles and hybrid technologies claims that, "A typical automobile in the USA uses about 4040 gallons of gasoline every month, producing about 750 lbs of carbon dioxide." To determine the truth of this statement, calculate how many pounds of carbon dioxide are produced when 40.0040.00 gallons of gasoline are subjected to complete combustion. Assume that the primary ingredient in gasoline is octane, C8H18(l),C8H18(l), which has a density of 0.703 g/mL.
In biological systems, enzymes are used to accelerate the rates of certain biological reactions. Glucoamylase is an enzyme that aids in the conversion of starch to glucose (a sugar that cells use for energy). Experiments show that 1 μg mol of glucoamylase in a 4% starch solution results in a production rate of glucose of 0.6 μg mol/(mL)(min). Determine the production rate of glucose for this system in units of lb mol/(ft3)(day). A. 0.0015 lb mol/(ft3)(day) B. 0.0315 lb mol/(ft3)(day) C. 0.0539 lb mol/(ft3)(day) D. 0.3569 lb mol/(ft3)(day)
Oxygen mask for producing O2 in emergency situations contain potassium superoxide, KO2 . It reacts with CO2 and H2O in inhaled air to produce oxygen: 4KO2 (s) + 2H2O(g) + 4CO2 (g) ------- 4KHCO3(g) + 3O2(g) . If a person is wearing such a mask exhales 0.702 g/min. How many grams of KO2 are consumed in 25 min?
Since the pandemic has hit, more people are growing their own gardens and processing the fruits of their work. One thing that is flying off the shelves are spices for canning, such as alum. From this lab, you have seen how easy it is to prepare an alum, and the ingredients to make this are not difficult to obtain. You are going to make a batch of pickles and the recipe requires 6.05g of alum for each quart jar of pickles and you plan on making 50 jar of pickles. The % yield of making alum is only 84.4%. a. What is the actual yield of alum that you need to prepare to make your pickles? b. What is the theoretical yield of alum required to prepare the pickles? c. What mass of aluminum do you need to start with to make the required amount of alum for the preparation of the pickles?
Nitrogen and oxygen gases react to form nitrogen dioxide, NO2, according to the following equation: N2(g) + 2O2(g) = 2NO2(g) 3.0 moles of N2 and 8.0 moles of O2 are combined in a chamber and allowed to fully react. How much of each gas is present in the chamber after the reaction? Also, is there a way to identify in a question which law I should be using in order to get my answers?
Automobiles are often implicated as contributors to global warming because they are a source of the greenhouse gas CO2. How many pounds of CO2 would your car release in a year if it was driven 110. miles per week? Gasoline is a complex mixture of hydrocarbons. In your calculations, assume that gasoline is octane (molecular formula C8H18) and that it is burned completely to CO2 and H2O in the engine of your car. Also assume that the car averages 27.3 miles per gallon and that the density of octane is 0.703 g cm-3.
Mercury is an environmental pollutant because it can be converted by certain bacteria into the very poisonous substance dimethyl mercury, (CH3)2Hg. This compound ends up in the food chain and accumulates in the tissues of aquatic organisms, particularly fish, which renders them unsafe to eat. It is estimated that in the United States, 232 tons of mercury are released into the atmosphere each year. If only 1.3 percent of this mercury is eventually changed to (CH3)2Hg, how many pounds of this compound are formed annually?
When solid sodium bicarbonate (NaHCO3) is heated, it produces gaseous carbon dioxide, liquid water, and solid sodium carbonate (Na2CO3). The unbalanced equation below shows this reaction. NaHCO3 (s) Na2CO3 (s) + CO2 (g) + H2O (l) If 10.2 g NaHCO3 is added to a 982 mL container at 55C, what volume of water will be generated by this reaction? Recall that the density of water is 1 g/mL. Report your answer in Liters (L) using scientific notation.

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