The half-life of 9USr is 29 years. What fraction of the atoms in a sample of 0Sr would remain 175 years later? Multiple Choice 0.17 0.50 0.062 0.12 0.015

Q: Question 22 What are the R/S designations of the two stereocenters of L-threonine? OH A. 2R,3R В.…

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Q: 36. What is the oxidation half-reaction? O Al³(aq) + 3e Al(s) 1 O Al(s)→ Al³(aq) + 3e O Co² (aq) +…

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Q: Question 25 Which of the following amino acids is a secondary amine? A. proline B. glutamine C.…

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Q: 31. Under acidic conditions, how many moles of H₂O are there in the overall balanced reaction? None…

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Q: A C13H220 |a. BuLi b. O C16H2402

A: First of all we will calculate degree of unsaturation.

Q: 33. Under basic conditions, how many moles of OH are there in the overall balanced reaction? 01 O…

A: Answer :---- The balanced equation are :---4Au + 2O2 + 8CN- + 2H2O → 4[Au(CN)2]- + 4OH-

Q: Instructions (questions 20–21): Consider the reaction below to answer the following questions. CH3…

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Q: Employing Le Châtelier's Principle, qualitatively predict whether formation of C;Hs increases,…

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Q: A sample of magnesium metal reacts completely with an excess of hydrocholoric acid: Mg(s) + 2…

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Q: Convert 2.72106521624284e+25 molecules of CO2 to grams of oxygen?

A: 1 mol = 6.022 x 1023 molecules. 1 mol CO2 = 44.01 g CO2  44.01 g CO2  =32 g Oxygen

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Q: The half-life of a second-order reaction, with respect to only one reactant, is independent of the…

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Q: 33 please help

A: Show the formation of different alcohol products in the following reactions

Q: 8. Identify each enthalpy change by name and classify each change as exothermic or endothermic. I…

A: 8. Given pocess, a)1 mol C3H8 (l) ---> 1 mol C3H8 (g)b)1 mol Hg (l) ---> 1 mol Hg (s)c)1 mol…

Q: 22. A normal adult jawbone contains 200 mg of Carbon-14 in a living person. If scientists found a…

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Q: I need 22,23,24,25

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Q: Calculate the mole fraction of sulfuric acid (H2SO4) in 8% (wt/wt) 98 g/mol, H2O 18 aqueousH2SO4…

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Q: 23. What volume of carbon dioxide gas at STP could be produced from the decomposition of 150.0 grams…

A: ★ Answer : 33.55 Litres CO2 gas will be produced at STP from the decomposition of 150g CaCO3. ★…

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Q: 29. Which of the following statement is correct? A. E2 is a concerted reaction in which bonds break…

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Q: 30. How many moles of electrons are there in the reduction half-reaction?

A: Reduction is gain of electrons or decrease in the oxidation state.

Q: Gallium(III) oxide reacts with thionyl chloride (SOCI2 ) to produce gallium(III) chloride and sulfur…

A: No. of moles of Ga2O3=31.90187.44=0.17no. of moles of SOCl2=64.96118.97=0.54/3=0.18Ga2O3 is the…

Q: 4. Determine the mole fraction of Methanol, CH3OH in a solution prepared by dissolving 4.5 g of…

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Q: 23. Which conditions favor an efficient (fast, high yield) Sn2 reaction between an appropriate alkyl…

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Q: ict the product of the following elimination reaction. 1 mole CH;0 o∞ oo o0 A в -OCH3 H3CO- D E

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Q: 24) If this substance was at a pressure of 2.0atm, at what temperature would it boil? 25) At what…

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Q: Calculate the molar concentration of a solution that contains 23 g of potassiumhydroxide. KOH in 250…

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Q: 4. The protein in a 1.2846-g sample of an oat cereal is determined by the Kjeldahl procedure for…

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Q: 3.75 Elemental phosphorus occurs as tetratomic molecules, P4. What mass (g) of chlorine gas is…

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Q: 5. Tell how many orbitals there are in each of the following sets, and explain each answer in terms…

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.