A Question 5 Retake question You determine the empirical formula of a compound to be CH3. In a separate experiment, you determine the molar mass of the compound to be 75.1735 g/mol. What is the molecular formula for this compound? A/ A Question 8 You time travel 100 years into the future and learn that several new elements (T, A. and D) have been discovered. Several molecules of these new elements undergo chemical reactions like the one shown below. T3A8 (g) +D2 (g) →TD₂ (g) + A₂D (1) -Retake question Balance this chemical reaction and give the coefficients for each reactant and product in the boxes below. (First box for T3A8, second box for D₂, third box for TD2, and fourth box for A₂D). A A/ A

A Question 5 Retake question You determine the empirical formula of a compound to be CH3. In a separate experiment, you determine the molar mass of the compound to be 75.1735 g/mol. What is the molecular formula for this compound? A/ A Question 8 You time travel 100 years into the future and learn that several new elements (T, A. and D) have been discovered. Several molecules of these new elements undergo chemical reactions like the one shown below. T3A8 (g) +D2 (g) →TD₂ (g) + A₂D (1) -Retake question Balance this chemical reaction and give the coefficients for each reactant and product in the boxes below. (First box for T3A8, second box for D₂, third box for TD2, and fourth box for A₂D). A A/ A

Chemistry

10th Edition

ISBN:9781305957404

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

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

Chapter3: Stoichiometry

Section: Chapter Questions

Problem 13ALQ: What is true about the chemical properties of the product? a. The properties are more like chemical...

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What is true about the chemical properties of the product? a. The properties are more like chemical A. b. The properties are more like chemical B. c. The properties are an average of those of chemical A and chemical B. d. The properties are not necessarily like either chemical A or chemical B. e. The properties arc more like chemical A or more like chemical B, but more information is needed. Justify your choice, and for choices you did not pick, explain what is wrong with them.
You take 1.00 g of an aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen), burn it in air, and collect 2.20 g CO2 and 0.400 g H2O. You know that the molar mass of aspirin is between 170 and 190 g/mol. Reacting 1 mole of salicylic acid with I mole of acetic anhydride (C4H6O3) gives you 1 mole of aspirin and 1 mole of acetic acid (C2H4O2). Use this information to determine the molecular formula of salicylic acid.
The space shuttle environmental control system handles excess CO2 (which the astronauts breathe out; it is 4.0% by mass of exhaled air) by reacting it with lithium hydroxide, LiOH, pellets to form lithium carbonate, Li2CO3, and water. If there are seven astronauts on board the shuttle, and each exhales 20. L of air pee minute, how long could clean air be generated if there were 25,000 g of LiOH pellets available for each shuttle mission? Assume the density of air is 0.0010 g/mL.
4.80 The reaction shown below is used to destroy Freon-12 (CF2Cl2), preventing its release into the atmosphere. What mass of NaF will be formed if 250.0 kg of CF2Cl2 and 400.0 kg of Na2C2O4 are heated and allowed to react to completion? CF2Cl2+2Na2C2O42NaF+2NaCl+C+4CO2
Carbon monoxide burns readily in oxygen to form carbon dioxide. 2 CO(g) + O2(g) 2 CO2(g) The box on the left represents a tiny portion of a mixture of CO and O2. If these molecules react to form CO2, What should the contents of the box on the right look like?
Consider the chemical reaction 2 S + 3 O2 → 2 SO3. If the reaction is run by adding S indefinitely to a fixed amount of O2, which of these graphs best represents the formation of SO3? Explain your choice.
3.55 An average person inhales roughly 2.5 g of O2 in a minute. How many molecules of oxygen are inhaled in (a) 1 minute, (b) 1 hour, (c) 1 day by an average person?
4.106 An ore sample with a mass of 670 kg contains 27.7% magnesium carbonate, MgCO3. If all of the magnesium carbonate in this ore sample is decomposed to form carbon dioxide, describe how to determine what mass of CO2 is evolved during the process.
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Many cereals are made with high moisture content so that the cereal can be formed into various shapes before it is dried. A cereal product containing 58% H2O by mass is produced at the rate of 1000. kg/h. What mass of water must be evaporated per hour if the final product contains only 20.% water?