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Radioactive element X decays to element Y with decay constant -0.3. Y decays to stable element Z with decay constant -0.2. Explain what is the system of differential equations for the amounts x(t), y(t), z(t) of the elements X, Y, Z respectively, at time t?
If you mix 10.0 grams of CH3SH with excess CO and 8.65 grams of CH3COSCH3 is produced, what is the percent yield of the CH3COSCH3?
Magnesium oxide (MgO) has the rock salt crystal structure and a density of 3.58 g/cm3. Determine the unit cell edge length.
a large evacuated tank whose volume is 10000ft3 is to be filled with carbon dioxide gas at atmospheric pressure
consider the following reactions and the associated rate laws. Which reaction represents an elementary step
there is no measurable difference between final and initial pH - that is why it is called a buffer E. final pH is 0.16 pH units lower than original pH
out of the options of sn2 substitution, e2 elimination, sn1, e1 how can you determine which reaction it will be given a reagant
Nuclides above the valley of stability can become more stable through which of the following processes
Calculate the partition coefficient of caffeine between water and each of the other three solvents. Which of these three organic solvents would be the best choice for extracting caffeine from an aqueous solution?
53.5 g of an ideal gas of molecular weight = 10.5 g/mol is confined at a pressure of 50 kPa. The density of the gas is 0.164 g/L. Compute the temperature of the gas in degrees Celsius.
The solubility product constant for AgCl at 298 K is 1.82 × 10-10. Calculate E° for the process AgCl+e----->Ag+Cl given that the standard reduction potential of the half-reaction Ag++e----->Ag is +.799V
Calculate the missing value in each problem. a. delta G=?; delta H=-217 kJ/mol; delta S=151 J/mol*K; T=451 K b. delta G= -20.4 kJ/mol; delta H= 107 kJ/mol; delta S= 211 J/mol*K; T
Which compound ranks #1 in terms of pounds produced annually in the United States. sodium hydroxide, ammonia
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