1. What compounds are in the following?Sodium bicarbonateBaking powderBaker's ammonia2. What is the purpose of the Gas Pressure Sensor for our measurements?3. What is the purpose of using baking soda or baking powder?4. Simona set up an experiment to measure the volume of 5.0 g of CO2 gas given off during areaction at 298 K. She measures the pressure to be 5 kPa. What is the volume of gas?

What compounds are in the following?Sodium bicarbonate: It is composed of sodium ions (Na+) and…

Answered: 1. What compounds are in the following?…

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter20: Environmental Chemistry-earth's Environment, Energy, And Sustainability

Section: Chapter Questions

Problem 5PS

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The mercury content of a stream was believed to be above the minimum considered safe —1 part per billion (ppb) by weight. An analysis indicated that the concentration was 0.68 parts per billion. What quantity of mercury in grams was present in 15.0 L of the water, the density of which is 0.998 g/ml? ( 1ppbHg=1ngHg1gwater)
1. A 0.68 gram sample of a volatile liquid was heated to 358 K. The gas occupied 265 mL of space at a pressure of 0.95 atm. What is the molecular weight of this gas? PV = nRT and R = 0.082 atmL/moleK. (Make sure that all your units agree/match R)2. An aspirin sample, 0.62 grams, was titrated with 28 mL of 0.105 M NaOH solution. What is the percent purity of this aspirin sample? (MM of Aspirin = 180. g/mol)3. A sample of hydrate was heated thoroughly. How many waters of hydration are there if the anhydrous salt had a dry mass of 12 grams and a molar mass of 185 g/mol? The mass of water evaporated from the hydrate was 5.0 g.4.A sample of water (80 grams) had a temperature change of 6. ℃. What was the heat change of this sample? (q = m c ΔT, c = 4.18 J/ g ℃)5. A 6.0 gram sample of epsom salt, MgSO4 ·nH2O, was heated. After heating, 2.9 grams of anhydrous salt remained. How many waters of hydration does epsom salt contain?6. What is the theoretical yield of aspirin if you started your…
chemical equation: What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)₂ is mixed with 0.500 L 0.300 M Nal? Assume the reaction goes to completion. the Balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous Nal. Include phases. $ 4 mass of precipitate: R F4 V % 5 T F5 G B ^ 6 MacBook Air F6 Y H & 7 N F7 U * 00 8 M DII F8 ( 9 DD F9 O V ) 0 F10 P ^. 1 F11 + g F12 20 del
1. 500.0 mL 0.2 M KI2. 500.0 mL 0.2 M KCl3. 500.0 mL 0.1 M K2S2O84. 500.0 mL 0.1 M K2SO45. 500.0 mL 4.0 mM Na2S2O3 (from Na2S2O3∙5H2O)pls compelete the 2nd table given the data
Explain how a geologist might use the flame test to identify a cation fromdifferent mineral specimens: calcite (calcium carbonate) versus cuprite (copper Ioxide). Are there precautions needed? What are they?
The substance to be analyzed – is white, highly soluble in water salt. Interaction with concentrated sulfuric acid leads to evolving of reddish-brown gas with pungent odour. Addition of ammonium oxalate leads to formation of white precipitate, which is insoluble in acetic acid. Diphenylamine reaction turns color of the solution to violet. What kind of salt is this? Ca(NO3) 2 NaNO2 KBrO3 MgCl2
10. True or False (use your periodic table/data sheet when appropriate) а. The cation formed from a neutral atom is always smaller than the neutral atom. b. The Celsius temperature of a gas is directly proportional to the average kinetic energy of the gas particles. The H-Br bond is more polar than the H F bond. NO, is the conjugate acid of the base, HNO2. A postulate of “The Kinetic Molecular Theory of Gases" is that gas particles do not attract each other. A solution with a pOH of 7.5 has a greater concentration of hydrogen ions than a solution with a pOH of 5.6. As the volume of a gas decreases, the pressure the gas exerts on its container increases (assume n & T remain constant). Real Gases approach Ideal Gas behavior at low Pressures and low temperatures. A solution with a pH of 6.3 has a greater concentration of hydroxide ions than a solution with a pH of 4.5. HCO3 (aq) is an amphiprotic substance. Vapor is any substance in the gaseous state that is usually a liquid or solid.…
1. Iron (Fe) nail + CuSO4 solution ? turned into the rusty Iron (Fe) nail turned into black substance of Carbon No reaction 2. CuSO4.5H2O is a _______________. anhydrous copper sulfate hydrated copper sulfate dehydrated salt
2. Suppose the concentration of CO₂ in the atmosphere is 360 ppm. Convert this to g/m³ when temperature and pressure is 20°C and 100hPa..
25 mL of hydroiodic acid generates 1.20 L of H2 gas at STP conditions when combined with excess zinc. What is the concentration (mol/L) of the hydroiodic acid? Zn + 2HI -> Znl2 + H2
Based on this. What was the percentage error in the percentage of water in the sample, compared to pure MgSO4•7H2O?
Which of the statements given below is correct? A. Iodometry is a method in which 12 solution is used as a titrant and the substances that can reduce iodine to iodine can be determined. B. Starch indicator is added to the medium at the beginning of the titration. C. All metal salts other than alkali salts dissolved in water cause hardness properties. D. 1 German hardness is the hardness of water containing cation equivalent to 1 mg CaCO3 per 100 mL.

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