Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this experiment
Lavoisier found that mercury(II) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas.
1. Write a balanced chemical equation, including physical state symbols, for the
decomposition of solid mercury(II) oxide (HgO) into liquid mercury and gaseous
dioxygen.
O-0
?
2. Suppose 54.0 mL of dioxygen gas are produced by this reaction, at a temperature
of 50.0 °C and pressure of exactly 1 atm. Calculate the mass of mercury(II) oxide
that must have reacted. Round your answer to 3 significant digits.
MacBook Air
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- Liquid hexane CH3CH24CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O . If 2.65g of water is produced from the reaction of 4.31g of hexane and 21.1g of oxygen gas, calculate the percent yield of water.Be sure your answer has the correct number of significant digits in it.arrow_forward(CONTINUED ON NEXT PAGE) 4. Let's say that the full volume of your flask is 325 ml. You heat the flask of air in a hot water bath at 89.0°C according to your thermometer. You then inverti into the cold water bath at 5.0°C Water enters the flask as the volume of the gas shrinks. a) Theoretically, what should the volume of the gas be after it sits in the cold water bath? b) You find that during your experiment that 65.0 mL of water has entered the flask. What is the experimental volume of the gas? c) What is your percent error for this measurement?arrow_forward4.35 L He/1 x 1 mole He/22.4 L He=0.19 moles He. Explain why the final answer of 0.19 moles makes more sense than 0.91 moles using the example answer attached to help.arrow_forward
- ce started, ne: 57 minutes, 35 seconds. Completion Status: A Moving to another question will save this response. Question 16 Magnesium 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 you generate if the above reaction goes to completion? 6.00 moles 2.00 moles 0.400 moles 4.00 moles 0.800 moles 1.00 mole 6:38 PM 3/26/2020 P Type here to search hp end home ins prt sc delete (12 f9 144 f8 f7 f6 num f5 backspace lock & L. 8. {' pausearrow_forwardlculation questions require you to enter a numerical answer. You should not include units in your reported an ough you should note them in your calculations. Unless the problem specifically ask for an answer in the pro significant figures, it is often in your best interest to enter as many digits as your calculator will give you. 1 Question 1 Given the unbalanced chemical equation, C5H12(1) + O2(g) → CO(g) + H20(1), which one of the following correctly expresses the mole ratio between CO and oxygen? 5 mole CO/11 mole O2 O 1 mole CO/1 mole O2 O 10 mole CO/11 mole O2 O 10 mole CO/6.5 mole O2 Question 2arrow_forwardGaseous butane CH3CH22CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O . Suppose 20. g of butane is mixed with 37.9 g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.arrow_forward
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