A student, Darlene, watches the same video. She attempts to write a chemical equation representing the reaction: Pb(NO3), + 2KI → Pbl, + KNO3 Her teacher comments that her equation is correct except that it violates the law of conservation of mass! a) How does her equation violate the law of conservation mass? Be specific! b) How can she fix her equation? Be specific!!

A student, Darlene, watches the same video. She attempts to write a chemical equation representing the reaction: Pb(NO3), + 2KI → Pbl, + KNO3 Her teacher comments that her equation is correct except that it violates the law of conservation of mass! a) How does her equation violate the law of conservation mass? Be specific! b) How can she fix her equation? Be specific!!

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter3: Molecules, Moles, And Chemical Equations

Section: Chapter Questions

Problem 3.13PAE: 3.13 An explosive whose chemical formula is C3H6N6O6 produces water, carbon dioxide, and nitrogen...

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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
3.13 An explosive whose chemical formula is C3H6N6O6 produces water, carbon dioxide, and nitrogen gas when detonated in oxygen. Write the chemical equation for the detonation reaction of this explosive.
hat happens to the weight of an iron bar when it rusts? l type='a'> There is no change because mass is always conserved. i>The weight increases. i>The weight increases, hut it the rust is scraped off, the bar has the original weight. i>The weight decreases. stify your choice and, for choices you did not pick, explain what is wrong with them. Explain what it means for something to rust.
If you had a mole of U.S. dollar bills and equally distributed the money to all of the people of the world, how rich would every person be? Assume a world population of 7 billion.
3.87 Nitric acid (HNO3) can be produced by the reaction of ni- trogen dioxide (NO2) and water. Nitric oxide (NO) is also formed as a product. Write a balanced chemical equation for this reaction.
hat do the coefficients of a balanced chemical equation tell us about the proportions in which atoms and molecules react on an individual (microscopic) basis?
Consider the equation 2A + B . A2B. If you mix 1.0 mole of A with 1.0 mole of B, what amount (moles) of A2B can be produced?
3.112 In one experiment, the burning of 0.614 g of sulfur produced 1.246 g of sulfur dioxide as its only product. In a second experiment run to verify the outcome of the first, a sample was burned and 0.813 g of sulfur dioxide was obtained, but the student running the experiment forgot to determine the initial mass of sulfur burned. Describe how the data already obtained could be used to calculate the initial mass of the sulfur burned in the second experiment.
The movie below shows some molecules in a tiny sample of a mixture of gases. 1234 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |||||▬▬▬▬▬▬▬▬▬| |||||▬▬▬▬▬▬▬▬▬▬▬▬|| Drag the slider to see how the molecules move. Does a chemical reaction happen during this movie? If a chemical reaction does happen, write a balanced chemical equation for it. 0 yes no carbon nitrogen chlorine key hydrogen oxygen bromine
Data Tabla 51589 3.053 54.639 52.99 g 52.939 Mass of empty crucible Mass of hydrate Mass of crucible and salt (before) heating Mass of crucible and salt (after: measurement 1) Mass of crucible and salt (after: measurement 2) Mass of water driven off Mass of Anhydrous Salt (Hydrate - Water) In lab a group was trying to determine the hydration number of a sample of Cobalt(II) chloride. In lab they were able to collect the required data (above) but had to finish the lab for homework. Once at home they forgot how to complete the calculation. Would you kindly help them with their calculation? What is the hydration number of this hydrate?
[References] CHEMWORK Consider the following unbalanced chemical equation. C5H12() + O2(g) → CO2(g) + H20(1) If 46.1 grams of pentane (C5H12) are burned in excess oxygen, how many grams of H20 will be produced? g H20 Submit Submit Answer Try Another Version 2 item attempts remaining
2) The following series of reactions were carried out. PBCO3(s) + 2HNO3(aq) → Pb(NO3)2(aq) + H2O(1) + CO2(g) Pb(NO3)2(aq) + 2HC1(aq) → 2HNO3(aq) + PbCl2(s) of che (a) If a student starts with 2.871 g of lead(II) carbonate for the first reaction and all other reagents are added in excess, what is the theoretical yield of lead(II) chloride solid? Noie-ne oaposition oght about b ated. AB Sde replaceent ractins ly a metal) is added in solut ctive than the ion whilethe less active