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Quinine, C20H24N2O2, is a component of tonic water and bitter lemon.
a. How many moles of hydrogen are in 1.7 mol of quinine? Express your answer using two significant figures.
b. How many moles of carbon are in 4.6 mol of quinine? Express your answer using two significant figures.
c. How many moles of nitrogen are in 2.0×10-2 mol of quinine?Express your answer using two significant figures.
A chunk of dry ice, CO2(s), weighing 6.9 g is sealed inside a 2 L soda bottle initially containing 1 bar of air. Explain what is the total pressure in the bottle after the dry ice sublimes as well as comes to 298.15 K
What are the equilibrium partial pressure of H2 when equilibrium is reestablished following the addition of 0.200 mol of HI?
What volume (mL) of the solvent HCCl3 should be added to 0.298 kg of the solute acetone to prepare a solution that is 1.12 m (CH3)2CO.
Write a chemical equation that illustrates each of the following. An aqueous solution of ammonia is basic. An aqueous solution of Fe3+(aq) is acidic.
A block of metal has a width of 3.2 , a length of 17.1 , and height of 4.2 . Its mass is 1.5 . Calculate the density of the metal.
If flask B were smaller than flask A, would the final pressure after the stopcock is opened be greater than, equal to, or less than 0.5 atm
degree C is mixed with 35.2 g/mL of water (density = 1.0 g/mL) initially at 24.4 degree C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
What is the concentration of the acid and base form of acetic acid when you start the experiment? c) In the process of the enzyme catalyzed reaction, 5mM H+ is produced. What is the pH of the solution after the reaction is complete?
Calculate the turnover number (k3 or k cat) for bovine catalase. Assume that a 1 x10 ^-8 M solution of catalase causes the breakdown of 0.4 M hydrogen peroxide per second at the fastest
Buffers that match the pH of blood and the cytoplasm are commonly required in scientific experiments. If you were studying the effects of lactic acid on muscles and needed to design a buffer that would have a pH of 7.2, what chemical components would..
Identify the part of the atom that most determines the chemical reactivity of the atom. Which is not one of the four atoms that make up the bulk of living organisms
A one-mole sample of a monatomic perfect gas with a constant pressure heat capacity of 20.85 J/(K mol) is initially at a pressure of 3.25 bar at 200 K. It undergoes an adiabatic reversible expansion until its pressure is 1.52 bar. Calculate: q, w,..
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