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- Calculate the average density of a single Al-27 atom by assuming that it is a sphere with a radius of 0.143 nm. The masses of a proton, electron, and neutron are 1.67261024g,9.10941028g, and 1.67491024g, respectively. The volume of a sphere is 4r3/3, where r is its radius. Express the answer in grams per cubic centimeter. The density of aluminum is found experimentally to be 2.70 g/cm3. What does that suggest about the packing of aluminum atoms in the metal?Cyclopropane mixed in the proper ratio with oxygen can be used as an anesthetic. At 755 mm Hg and 25C, it has a density of 1.71 g/L. (a) What is the molar mass of cyclopropane? (b) Cyclopropane is made up of 85.7% C and 14.3% H. What is the molecular formula of cyclopropane?Paracelsus, a sixteenth-century alchemist and healer, adopted as his slogan: The patients are your textbook, the sickbed is your study. Is this view consistent with using the scientific method?
- . C. 5. .. 6. . S. .. .. _H3PO4 + КОН → K+ _B₂O3 → HCI + NaOH → C + S8→ Na + _O₂ → NaOH + _C6H6 + _N₂ +. KOH + HBr → _AI(OH)3 + Rb + Li + _C10H22 + _AI(OH)3 + NHẠCH+ Rb + — RbNO3 → _O₂ → _H₂ → _H₂CO3 → _NH3 + _FeS₂ + CH4 + _CA3(PO4)2 + _O₂ → _H₂O → BALANCING EQUATIONS WORKSHEET CS₂ KBr + _H₂O _H₂CO3 → _Al2(CO3)3 + S8 → O₂ → K₂O + B O₂ → HBr → O₂ → Na₂O _H3PO4 → NH3 _K3PO4 + _H₂O NaCl + _H₂O _CO₂ + _Na₂CO3 + _H₂O RbO₂ + _N₂ CO₂ + SIO₂ + Rb₂S _N₂ + LIOH + _H₂O AlBr3 + _H₂O _H₂O (NH4)3PO4 + _H₂O H₂ _H₂O _Fe₂O3 + _CO₂ + _H₂O C → SO₂ _H₂O CaSiO3 + CO + P1PrqdNDx-hBYyzKo-xfiM9-Jlq7EAaWe3GBt t3U3jDo/edit ulator O A Land of Permane... it was seconds ago - UA E- EE 2 Al + 3 H,SO, 6. How many grams of hydrogen gas are produced with 0.S8 moles of aluminum sulfate? 3 H, + Al,(SO); 0.88 moles Al (SO), 3 moles H. 6 g H. 0.88 moles Al (SO), 1 mole H.Inbo (534) Conv I Balar b Ansv Post CHE 101 C X с Chec bartl bartl The b My C Unkr O Sear E I ma G what app.101edu.co/# Bryant's Gmail Cascadia Canvas Lo... T GSBA Scholarship L... HOMEGROWN TRA... Learn Touch Typing... C The Science of Well... Investor360° ® Login ClickUp Reading list >> Question 28 of 40 Submit The OH concentration in an aqueous solution at 25 °C is 6.1 x 10 5. What is [H*]? 1 4 C 7 8 9 +/- х 100 + 10:59 PM e Type here to search 59°F 8/26/2021 LO (8)
- Inbo (534) Conv I Balar b Ansv Post CHE 101 C X с Chec bartl bartl The b My C Unkr O Sear E I ma G what app.101edu.co/# Bryant's Gmail Cascadia Canvas Lo... T GSBA Scholarship L... HOMEGROWN TRA... Learn Touch Typing... C The Science of Well... Investor360° ® Login ClickUp Reading list >> Question 38 of 40 Submit Determine the mass of solid NaCH:COO that must be dissolved in an existing 500.0 mL solution of 0.200 M CH:COOH to form a buffer with a pH equal to 5.00. The value of Ka for CH:COOH is 1.8 × 10-5. 1 2 3 NEXT > Let x represent the original concentration of CH:COO- in the water. Based on the given values, set up the ICE table in order to determine the unknown. CH:COOH(aq) + H2O(I) H:O*(aq) + CH:COO (aq) Initial (M) Change (M) Equilibrium (M) 5 RESET 0.200 5.00 -5.00 1.0 x 10-9 -1.0 x 10-9 1.0 x 10-5 -1.0 x 10-5 1.8 x 10-5 -1.8 x 10-5 x + 5.00 х- 5.00 x + 1.0 x 10 9 х- 1.0 x 109 x + 1.0 × 10-5 х- 1.0 х 105 x + 1.8 x 10-5 х- 1.8 х 10-5 + 11:01 PM e Type here to search 59°F 后 W…Inbo (534) Conv I Balar b Ansv Post CHE 101 C X с Chec bartl bartl The b My C Unkr O Sear E I ma G what app.101edu.co/# Bryant's Gmail Cascadia Canvas Lo... T GSBA Scholarship L... HOMEGROWN TRA... Learn Touch Typing... C The Science of Well... Investor360° ® Login ClickUp Reading list >> Question 40 of 40 Submit Determine the pH of a buffer that is 0.55 M HNO2 and 0.75 M KNO2. The value of Ka for HNO2 is 6.8 × 10-4. 1 NEXT > Based on the given values, set up ICE table in order to determine the unknown. HNO:(aq) H2O(1) H3O*(aq) NO: (aq) + + Initial (M) Change (M) Equilibrium (M) 5 RESET 0.55 0.75 6.8 x 10-4 +x -X +2x -2: 0.55 + x 0.55 - x 0.55 + 2x 0.55 - 2x 0.75 + x 0.75 - x 0.75 + 2x 0.75 - 2x 11:04 PM e Type here to search 59°F 后 小 8/26/2021 (8)Inbo (534) Conv I Balar b Ansv Post CHE 101 C X с Chec bartl bartl The b My C Unkr O Sear E I ma G what app.101edu.co/# Bryant's Gmail Cascadia Canvas Lo... T GSBA Scholarship L... HOMEGROWN TRA... Learn Touch Typing... C The Science of Well... Investor360° ® Login ClickUp Reading list >> Question 39 of 40 Submit Determine the pH of a buffer formed by dissolving 20.0 g NaCH:COO into a 500.0 mL solution of 0.150 M of CH:COOH. Assume the volume of the solution does not change. The value of Ka for CH:COOH is 1.8 x 10-5. 1 2 NEXT > Based on the given values, set up ICE table in order to determine the unknown. CH:COOH(аq) + H2O(1) H;O*(aq) + CH:COO-(aq) Initial (M) Change (M) Equilibrium (M) 5 RESET 20.0 0.150 0.244 0.488 0.678 +x 20.0 + x 20.0 - x 0.150 + x 0.150 - x 0.244 + x 0.244 - 0.488 + x -X 0.488 - x 0.678 + x 0.678 - x + 11:03 PM e Type here to search 59°F W 8/26/2021 (8)
- M Apple Google Disney ESPN Yahoo! Biomedical Careers Program ☆ For the reaction Fe(s) +2HCl(aq)→→→→→FeCl₂(s) + H₂(g) AH° = -7.4 kJ and AS° = 107.9 J/K B Submit Answer Apple ☆ prod03-cnow-owl.cengagenow.com iCloud Yahoo Images Bing Google Wikipedia Facebook Twitter LinkedIn G b COWLv2... b D2L D2L D2L [Review Topics] [References] Use the References to access important values if needed for this question. D2L The maximum amount of work that could be done when 2.08 moles of Fe(s) react at 286 K, 1 atm is Assume that AH° and AS° are independent of temperature. Retry Entire Group 4 more group attempts remaining The Weather Channel C D2L Yelp TripAdvisor M kJ. +A student caried out this experiment and obtained the following data: Patm = 656.7 mm Hg Vinitial = 0.30 mL Mass of Alka-Seltzer sample = 0.123 g TH2O = 27.0°C Vfinal = 17.05 mL Determine the following: a. Calculate the number of moles of carbon dioxide present. b. Calculate the mass of NaHCO3 present in the sample. c. Calculate the mass % of NaHCO3 in the Alka-Seltzer.8. Fill in the following boxes. . HO. heat HO. SOC2 NaN3 1. he t 2. H2C 2 Mel +
