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A solution was prepared by mixing 10.00mL of a solution containing element X with 5.00mL of a standard, whose concentration was 8.24ug/mL, as well as diluting to 50mL. This solution was examined and the instrument response for the unknown was 1.69 times the signal due to the standard. In a separate experiment, it was found that for equal concentrations of element X as well as the standard the response for element X was 0.930 times intense as the standard. Explain what is the concentration of element X in the unknown expressed as ug/mL.
A compound consist of 40.00% carbon, 6.71% hydrogen and 53.29% oxygen and has a molecular mass of 180+- 1g/mole. Determine the empirical and molecular formulas of the compound.
The specific heat of iron metal is 0.450 J/g-K. How many J of heat are necessary to raise the temperature of a 1.05-kg block of iron from 25.0 Celcius to 88.5 Celcius
The equilibrium constant for this reaction is Keq=4 at 110C. In a certain experiment, .6 moles each of water vapor and carbon monoxide are introduced into a 2 Liter vessel at 110C
a certain second-order reaction has a rate constant of 1.75times10-3 at 27 and an initial half-life of 274 . what is
you have 75.0 ml of a 2.50 m solution of na2cro4aq. you also have 125 ml of a 1.52 m solution of agno3aq. calculate the
Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 25.0 L.
Calculate the energy difference (delta E) for the transition of n=4 to n=2 for 1.00 mol of hydrogen atoms.
Balance the following redox reactions. Break your answer down into individual steps not just the final balanced numbers. a) P4(s) + NO3^- ==>> H2PO4^- +NO(g) (acidic solution)
Give examples of a neutral salt, acidic salt and basic salt. Explain your choice.
What is the mechanism for the trans-esterification reaction of acetylsalicylic acid and methanol into methyl salicylate
A hypothetical reaction X + 2Y ® Products is found to be first order in X and second order in Y. What are the units of k, the specific rate constant, if reaction rate is expressed in units of moles per liter per second? A) M•s-1 B) M-2•s-1 C) M-3•..
The concentration of cholesterol, glucose and urea in the blood as of a fasting individual are listed below in units of mg/100mL. Change these concentrations into units of mM.
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