Based on mole ratios. A sample is 59.53% C, 5.38%H, 10.68%N, and 24.40%O what is its empirical formula. A 0.2000 gram sample of a compound (vitamin C) composed of only C, H, and O is burned completely with excess O2 . 0.2998 g of CO2 and 0.0819 g of H2O are produced. What is the empirical...
A. If 139 L of 18.0 M H2SO4(aq) is diluted to a final volume of 5.00 L, what is the pH of the resultant solution? B. Consider the following reaction: A(g) B(g) where Keq = 1.0 x 10-2. Which of the following statements are true at equilibrium? C. Consider the following reaction at equilibrium:...
Many pharmaceuticals are distributed in a mixture with an inert binder material to form tablets Current dietary supplement tablets usually contain starch in the binder material Ignore them, and watch just for disappearance of the purple color from the solution Try the xylene method?
Liquid ammonia (boiling point = -33.4C) can be used as a refrigerant and heat transfer fluid. Which one of the following quantities is generally not obtainable from a single heating or cooling curve of a substance, measured at atmospheric pressure?
10. Which of the following should have the highest boiling point?
3/8/2008 Which species would react fastest with electrophiles? How are enolate ions prepared? How are enolate ions prepared? Are enolate ions formed when a weaker base is used? Water is about 10,000 more acidic than a C=O compound. Hydroxide is about 10,000 less basic than an enolate. Are...
Overlying landowner has right to reasonably use gw called American Rule quantity: cannot waste; otherwise no limits location: can use the water only on overlying land well interference: no liability if not wasting water, use is on overlying land depletion: ditto sw-gw: ditto unless courts have...
Why is a large steroid molecule able to cross the cell membrane when a small molecule cannot? 2. Look up the molecule teicoplanin. (a) What class of drug does teicoplanin belong to? (b) What does it do? (c) What structural features of teicoplanin are important to its activity? 3. Which amino...
Draw three simple molecules that illustrate the geometry of each states. B. Define" reduction" with reference to organic reactions. C. Give the generalized chemical equation for the dissociation of an organic acid HA (Ka). D. What are the key differences between SN1 and SN2...
Career: Osteopathic Physician (D.O.) What is an Osteopathic Physician?
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- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)