1 answer

Mixed. (1) 9.110.274 moles of a substance weighs 62.5 g. what is the molar mass of...

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mixed. (1) 9.110.274 moles of a substance weighs 62.5 g. what is the molar mass of the substance, in units of g/mol? (1) 228
mixed. (1) 9.110.274 moles of a substance weighs 62.5 g. what is the molar mass of the substance, in units of g/mol? (1) 228 g/mol (2) 17.1 g/mol (3) 4.38 x 10 g/mol (4) 62.8 g/mol 10. Identify the correct net ionic equation for the reaction that occurs when solutions of Ba(CIO) and KSOiare (1) Ba?"(aq) + SO2(aq) +BaSO4(s) (2) 2K (aq) + 2CIO (aq) - K(CIO)a(s) (3) Kla) ClOc(aq) - KCIO (S) (4) Bal(aq) + (aq) + SOP(q)- kBaSO4(6) 11. A compound with an empirical formula of CH Bry has a molar mass of 373.69 g/mol. What is the molecular formula? (1) CHB (2) CH Brs (3) CHBr? (4) CH.Bra 12. Chlorine gas can be made from the reaction of manganese dioxide with hydrochloric acid. Mno(s) + 4HCl(aq) + MnCl(aq) + 2H,0(0) + C(9) According to the above reaction, determine the limiting reactant when 3.0 moles of MnOare reacted with 13.0 moles of HCL (1) MnO (2) HCI (3) MnCe (4) CE (5) H.O 13. Based on the solubility rules, which of the following should be soluble in water? (1) AgBr (2) AgCOM (3) AgNO (4) Ag.S 14. The distinguishing characteristic of all nonelectrolyte solutions is that they (1) contain molecules (2) conduct electricity (3) react with other solutions (4) are colorless 15. For which one of the following compounds is chlorine in the +5 oxidation state? (1) Nacio (2) HCIO (3) KCIOS (4) CIO, 16. The oxidation number of sulfur in KSOis (1) 6 (2) 4 (3) 2 (4)-1 17. Which of the following compounds is a strong electrolyte? (1) H.O (2) CO (3) CH.CH OH (ethanol) . (4) KCI 18. Identify the oxidizing agent in the following chemical reaction 2Mnr. 5H-SO2Mn + 580.- 4H+ + 3H20 (1) Mor (2) H.SO (3) Mn2 (4) SO- 19. Predict the products of the following single replacement reaction: Zn(s) + CoClaq) (1) No reaction occurs (2) Cols) ZnCl(aq) (3) CoC (aq) + ZnCl(aq) (4) ZnCo(a) Clog) 20. How many milliers of a 6.0 M HNO, solution are needed to make 0 25 L of a 3.5 M HNO, solution? (1) 686 m (2) 428 ml (3) 146 mL (4) 119 mL 21. A naturally occurring element consists of three isotopes. The data for the isotopes are isotope 1: 146.9672 amu, 64.792% isotope 2: 148.9638 amu, 26.117% isotope 3: 149.9592 amu, 9.0910% What is the average atomic mass of this naturally occurring element? Give the correct number of significant figures and units with your answer. 13 pts)

Answers

Q-9) (1) Mels Given Mass Molar Mass Melar Mon - 62.5 = 228 g/mol 0.274 0 10 carorat Ionic Equdion for Baldlou, tkson is Bahraa mole of sell react with = 1 mole of ano. 13 mele of Hel = 4 x 13 = 3.25 mole of eną But we are not provided with 3.25 male

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