Escoja la reacción que no funcionaría como está escrita: O a. O b. 0 с. O d. НО. H₂CO EtO OCH3 O 'Н Br Br Mg THF 1. MeMgBr, THF 2. H₂O Mg THF 1. MeMgBr, THF 2. H₂O
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- The simplifying assumption (a.k.a. the 100 rule) Nitrogen oxides from exhaust gases are a serious pollution problem. One such reaction is given here: N2(g) + O2(g) ⇌ 2 NO(g) At the temperature of the exhaust gases from a particular engine the value if K is 4.2 x 10-8. A chemist puts 0.085 mol of nitrogen and 0.038 mol of oxygen in a rigid 1.50 dm3 cylinder. What is the concentration of nitrogen monoxide gas in the mixture at equilibrium?for the reactions given in the figure below, define the reaction products by naming them as well as argue the type of reaction depending on the reaction conditions. a) What is the role of the OH particle in these two reactions?Delta S is a negative for the reaction___. Ca(NO3)2 (aq) +Na2SO4(aq) -> CaSO4(s) +2NaNO3(aq) KBr(aq) -> K+ (aq) + Br- (aq) C6H12O6 (S) ->6C(s) +6H2 (g) +3O2 (g) H2O (I) -> H2O (g) 2NO2(g) -> N2 (g) +2O2 (g)
- PbCrO4 is a common pigment called chrome yellow (or school bus yellow). It has a solubility of 1.71 x 10-4 g/L. The solubility product of PbCrO4, Ksp = ________. Enter the result in scientific notation to 1 decimal. e.g. enter 5.6x10-5 as 5.6E-5.A commercial product designed to prevent cut fruit from turning brown contains a mixture of ascorbic acid (HC6H7O6) and sugar (C12H22O11). Calculate the percent (w/w) of ascorbic acid in this product if a 2.1994 g portion of this product requires 36.15 mL of 0.2328 M NaOH to reach a phenolphthalein endpoint. MM HC6H7O6: 176.12 MM NaOH: 40.00Write the expression Kc for the following reactions. (a) Fe2+(aq) + Ce4+(aq) ⇋ Fe3+(aq) + Ce3+(aq) (b) CaCO3(s) ⇋ CaO(s) + CO3(g)
- Some sulfuric acid is spilled on a lab bench. You can neutralizethe acid by sprinkling sodium bicarbonate on it and thenmopping up the resulting solution. The sodium bicarbonatereacts with sulfuric acid according to:2 NaHCO3(s) + H2SO4(aq)----->Na2SO4(aq) + 2 H2O(l)+ 2 CO2(g)Sodium bicarbonate is added until the fizzing due to the formationof CO2(g) stops. If 27 mL of 6.0 M H2SO4 was spilled,what is the minimum mass of NaHCO3 that must be addedto the spill to neutralize the acid?calculate the molar concentration of the chemical reaction. use the ratio were acid and base reacts10 mL of acetic acid 24.1 mL of NaOH Please Answer ASAPOften, you are just trying to write the equations as one big equation. It is easier to follow what is going on if we write them one at a time;CH3)3CCl + H2O --> (CH3)3COH + Cl- + H+this reaction produces tert butyl alcohol, which we can not measure directly. so we titrate the solution with NaOH, and the parts that react with the base is H+H+ + Cl- + NaOH -> H2O and Na+ and Cl- we can determine when we have reached the endpoint with the help of the indicator. since every mole of NaOH reacts with a mole of H+. if we know the moles NaOH used we can find the moles of H+ created. In the first equation, we learn that every mole of tert butyl chloride produces 1 mole of H+ and 1 mole of tert butyl alcohol (our desired product). therefore moles NaOH = moles H+ = moles tert butyl alcohol. explain how you can calculate product concentration.
- Calcium iodide (CaI2) is added to water at a concentration of 85 mM. When mixed well and allowed to dissolve, the following reaction occurs: CaI2 --> Ca2+ + 2 I- a.Find the CaI2 concentration added to water (in mg/L). b.What is the calcium ion (Ca2+) concentration in water (in mg/L and M)? c.What is the iodide ion (I-) concentration in water (in mg/L and M)?Given the reaction at 25 ºC: CH3CH3(g) + 2H2O(g) + Ni(s) <=> 2CO(g) + 5H2(g) + Ni(s) ∆H= +300 kJ/mol Increasing the reaction temperature will? a. increase the CO concentration b. decrease the H2 concentration c. decrease the amount of Ni d. increase the CH3CH3 concentrationNorth of Kingston you discover a hidden mountain and name it Mt. Kevinmanjaro, which weighs 1x1012 kg and is made entirely of CaCO3(s) (MW = 100 g/mol, Ksp = 3.3×10–9). Each year the mountain received approximately 1×106 L of rainfall, which flow from the mountain completely saturated with Ca2+(aq). How many years will it take to entirely dissolve Mt. Kevinmanjaro? 226 million years 226 billion years 174 billion years 199 billion years 300 million years