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While the radio waves transmitted by a radio station have a frequency of 81.7 MHz, Define the wavelength of the waves, in meters?
What is the pH of a phosphate buffer when [H2PO4-] = 40 mM and [HPO42-] = 30 mM?
How many grams of solute are needed to prepare 500.0 mL of a 0.375 M CH3OH solution.
the vapor pressure of chlorine dioxide clo2 is155torrat-22.75 ? cand485torrat 0?c. what is the normal boiling point of
Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction.
If 12.0 g of O2 is required to inflate a balloon to a certain size at 27 OC what mass of O2 is required to inflate it to the same size (and pressure) at 5.0 oC.
If a balloon containing 1,200 L of gas at 25C and 760 mm Hg pressure ascends to an altitude where the pressure is 380 mm Hg and the temperature is 54C, the volume will be.
consider the reaction with the rate law rate kbro3-br-h2by what factor does the rate change if the concentration of
Calculate the change in the entropies of the system and the surroundings, and the total change in entropy, when a sample of nitrogen gas of mass 14 g at 298 K and 1.00 bar doubles its volume in a.) an isothermal reversible expansion
Calculate the molality of a solution that contains 56.5g of benzoic acid, C6H5COOH, in 350mL of ethanol, C2H5OH. The density of ethanol is 0.789g/mL.
Before the reaction began, the concentrations of the reactants were 0.060 M of SO2 and 0.050 M O2. After the equilibrium is reached, the concentration
Among the following pairs of conjugate acid/base, which one is the best choice (with mole ratio nearest to 1) to make a buffer at pH 6.6. The Ka values for the following acids are
What is the concentration of the sodium ion (in M) in a solution of 0.607 M sodium sulfate
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