Please send help :) leotopeMass (amu)Abundance2027.9892.21%2928.944.70%3229.973.09%12-13. Using the table above determine the average atomic mass of the element and then usethe periodic table to determine the identity of the element.Average atomic massName of element14. When a chemical change occurs:a. atoms are rearranged.b.the law of conservation of mass is always obeyed.the chemical properties of new substances are different from the ones youstarted with.d. All of the aboveC.15.ln which of the following situations does water undergo a change in physicalproperties?The bathroom fills with steam when you take a hot shower.b. The neighbor's pond freezes over in winter.C. Water is broken down to yield H2 and O2.d. (a) and (b) only.a.16-28.. Fill in the following table with the correct informationElementSymbolAtomicMassNumberofNumber ofNumber ofNumbNumberneutronselectronsprotons11erBoron-11Boron-10105BZinc-66303629. A substance that increases the rate of a reaction without itself being used upcalled a(n)Intermediate productb. Inhibitorc. Catalystd.Activated complexa.30. What is the standard form for a single-replacement reaction?a. AX + BY AY+ BXb. A+BAB

15. A physical property is one in no new substance is forms, the change is physical i.e. color,…

15.In which of the following situations does water undergo a change in physical properties? a. The bathroom fills with steam when you take a hot shower. b. The neighbor's pond freezes over in winter. C. Water is broken down to yield H2 and O2. d. (a) and (b) only.

15.In which of the following situations does water undergo a change in physical properties? a. The bathroom fills with steam when you take a hot shower. b. The neighbor's pond freezes over in winter. C. Water is broken down to yield H2 and O2. d. (a) and (b) only.

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Answer both questions please it wouldn't hurt 1) For the following write out the Ksp expression: Note: If the ion doesn't have a superscript add in "1" and start with the cation then the anion. Example of format: CuCl2 (s) Ksp = [Cu^2+]^1[Cl^1-]^2 (a) CaF2 (s) Ksp = []^[]^ (b) Al2S3 (s) Ksp = []^[]^[]^ 2) Calculate the silver ion, of a solution prepared by dissolving 1.00 g of silver nitrate and 10.0 g of KCN in sufficient water to make 1.00L. Kf = 1.00 x 1021 Ag+(aq) + 2 CN- (aq) ↔ [Ag(CN)2]- (s)
doug began preparing laboratory surface disinfectant from chlorine bleach. he put on a chemical resistant apron and gloves and then removed the bleach container from the special chemical cabinet. he carefully placed the container on the laboratory benchtop and began to add the chlorine bleach to distilled water. nearby workers began complaining of burning eyes. doug was reprimanded by the supervisor. Explain why.
16. The combustion of gasoline (octane) in a car engine can be represented by the following equation: 2C3H18(1) + 2502(g) a. What mass of oxygen is used up to burn a full tank of 36.00 kg of gasoline? Text --> 16CO2(g) +18H20(g) b. Why might a vehicle that is calibrated to run perfectly at sea level run poorly at higher elevations? Text Тext According to the Canadian Automobile Association, the average Canadian drives 20,000 km/yr. C. Assuming that distance, how many more kg of carbon dioxide are added to the atmosphere each year by a Toyota Tacoma (fuel economy of 12.8 L/100 km) than a Toyota Prius (4.52 L/100 km)? The density of gasoline is 0.719 kg/L.
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tion 12 - Chapter 10 Home X ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fclasses.alaska.edu%252Fwebapps%252Fport ter 10 Homework i 2 ts Skipped eBook Hint Print References + Mc Graw Hill NH4NO3 → (Click to select) N20 + Balance the chemical equation. Note that you must select "1" if that is the correct coefficient, though the "1" is not typically written in a balanced equation, but is implied. (Click to select) NH4NO3 5 2 1 JUL 11 Saved (Click to select) H20 AN 1 átv Help A S
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Ctrl Caps Shift M Inbox (1,543)-ftantill@udeledu x Mail-Francesca A Tantillo-Out x Homepage-CHM150-251 Chen X ← C - с app.101edu.co Question 19 of 20 Vitamin C (ascorbic acid, CeHsO6, 176.12 g/mol) can be measured by redox titration with iodine solution. lodine is reduced to iodide ion, while ascorbic acid is oxidized to dehydroascorbic acid (C6H6O6). The iodine solution is usually made in the presence of iodide ion, forming the more stable triiodide ion, Is, giving the following overall reaction CeHsOc(aq) + Is (aq) + H₂O(1)→ CHO(aq) + 31-(aq) + 2H+(aq) The titration is carried out in the presence of starch, which forms a dark blue complex with the excess iodine when the endpoint is reached. Ascorbic acid can be used to standardize the iodine solution. A 0.315 g sample of ascorbic acid was titrated with iodine solution, requiring 30.2 mL to reach the endpoint. Calculate [ls], the molar concentration of Is ion in the solution. O L Tab En Esc 79°F Sunny ! 1 Q A N FI @ 2 W S F2 X # 3 E D…
Name the following compounds Time left 0:15: CI Σ 31
You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 34.9 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample? -don't prematureley round
OWLV2 | Online teaching and X 0mySigTau xb Login | bartleby X M COMM.1113: FUND OF ORA X G what food has c - Google Se X + om/ilrm/takeAssignment/takeCovalentActivity.do?locator=assignment-take D [References] hotogray lenses incorporate small amounts of silver chloride in the glass of the lens. When light hits the AgCl particles, the following reaction occurs: hv AgCl Ag + Cl The silver metal that is formed causes the lenses to darken. The enthalpy change for this reaction is 2.90 × 10² kJ/mol. Assuming all this energy must be supplied by light, what is the maximum vavelength of light that can cause this reaction? Wavelength %3D nm Submit Answer Try Another Version 3 item attempts remaining Previous Next