How much isotope would remain after 15 days
If you have 200.0 g of radioisotope with a half-life of 5 days. How much isotope would remain after 15 days?
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Calculate the formal concentration of a sodium acetate solution prepared by diluting 45.0 mL of a solution containing 25.0 ppm sodium acetate (NaC2H3O2) to a total of 0.500 liters of solution.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 62.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 235.0 mL of solution. What is the molarity of the ethanol in this solution?
Magnesium powder reacts with steam to form magnesium hydroxide and hydrogen gas. What is the pecentage yield of 10.1g Mg reacts with an excess of water abnd 21.0g Mg 9g (OH)2 is recovered?
Based on molecular structure, arrange each of the following sets of molecules in order of increasing acidity. Explain your answer for each in one or two complete sentences.
Approximately how many grams of monosodium succinate (FW = 140 g/mol; succinic acid pK2=5.64) and disodium succinate (FW = 162 g/mol) must be added to 1L of water to produce a solution with a pH 5.28 and a total solute concentration of 100 mM. (An
When hydrogen sulfide gas is bubbled into a solution of sodium hydroxide, the reaction forms sodium sulfide and water. How many grams of sodium sulfide are formed if 11.78 g of hydrogen sulfide are bubbled into a solution containing 48.88 g of so
Combustion analysis of 0.395 g sample of unknown compound produces 1.072 g CO2 and 0.307 g H2O. Analysis also indicates the presence the presence of 0.068 g N in the sample.
After equilibrium was reached, the total pressure was 0.836 atm and the partial pressure of oxygen was 0.0275 atm. Calculate Kp for each of these reactions.
Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 60C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of
Dinitrogen pentoxide decomposes in the gas phase to form nitrogen dioxide and oxygen gas. The reaction is first order in dinitrogen pentoxide and has a half-life of 2.81 hours at 25 degrees Celcius.If a 1.3 L reaction vessel initially contains 750
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Why was the Church resistant to change? What was the Council of Trent? What was its purpose? What results did the Council of Trent produce?
Explain how you can improve your practice and achieve your professional goals by reading article about practice or attending trainings and continuing education.
Between the years 1931-1940, what are some examples of "the Two Spains" or "las dos Españas" and how did this phenomenon manifest itself
What moral and ethical questions are raised by the North's decision to wage a hard war against the South and William T. Sherman's conduct
Identify any current advertisement for alcohol or another drug. Which group or groups is it targeting? What message do you think could used to counter this ad?
how does politics and the military overlap? How does politics and religion overlap? How does the military and religion overlap?
The Japanese invasion of Manchuria and Italy's occupation in Abyssinia (Ethiopia) were challenges to the restrictions established by the League of Nations.