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- Choose the correct answer to fill in the product blank ("???") below. 1on ??? -> 14156B 92, 236Kr 3on 23592U 9237RB None of the above 9436Kr4G "l ooredoo K/s CHEM1101-Che... Suftanate of Oman Minitry of Hiyher Education Chemistry 1 – ENDR1101: Tutorial (3) – Chapter 3 gg Depa 27. An element consists of 1.40% of an isotope with mass 203.973 amu, 24.10% of an isotope with mass 205.9745 amu, 22.10% of an isotope with mass 206.9759 amu, and 52.40% of an isotope with mass 207.9766 amu. Calculate the average atomic mass and identify the element. 30. Assume silicon has three major isotopes in nature as shown in the table below. Fill in the missing information. Isotope Mass (amu) Abundance 28Si 29Si 27.98 4.70% 32Si 29.97 3.09% 37. Aluminum metal is produced by passing an electric current through a solution of aluminum oxide (Al,O;) dissolved in molten cryolite (Na;AIF,). Calculate the molar masses of Al,O, and Na;AIF. 55. What number of atoms of nitrogen are present in 5.00 g of each of the following? a. glycine, C,H;O,N b. magnesium nitride c. calcium nitrate d. dinitrogen tetroxide 62. Arrange the following substances in order…Draw atomic depictions for(a) ²⁰⁷₈₂Pb; (b) ⁹₄Be; (c) ⁷⁵₃₃As
- c) CO₂Et + H cat. N I N: HOLOOKED CO₂Etge-R x 21/FA-CHM-121-08 General Che * OWLv2 | Online teaching and lea G how to find mass percent - Goo x + mengagenow.com/ilm/takeAssignment/takeCovalentActivity.do?locator=assignment-take A sample of gas mixture from a neon sign contains 5.12 x 10 mol Ne and 4.40 × 10¬4 mol Kr. What are the mass percentages of Ne and Kr in the gas mixture? Mass percentages of Ne = Mass percentages of Kr = Submit Answer Try Another Version 6 item attempts remaining1PrqdNDx-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.
- 3. D +je + SNi 4. P – 32P 15 325 16 5. 12°BA + _ie Ba+ _ĝe 56 6. 23°PU → 94 + 235UModule 7B- Stol G molar mass of ca V stemble Learning why can X U Clear Oval Hou 228/assignments/389/tasks/101 4/18 tasks attempted Based on the balanced reaction below, determine the number of grams of oxygen required to completely react with 3.40 g of propane, C3Hs C3HS (g) + 5 O2 (g) 3 CO2 (g) + 4 H20 (1) Mass of Oxygen Gas SAVE RESPONSE 7 18 1.116.0 PRIVACY POLICY TERMS OF USE CONTACT INFORMATION MacBook Pro G Search or type URL %2328. a) 60u Calculate the molecular mass of HNO3 b) 63u c) 65u