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A sample containing 15ug of Scandium Sc-45 is irradiated to where 0.01% of the atoms have captured a neutron and become Sc-46. Half life 831d. Explain what is the activity of the sample upon removal from the reactor and 45 days later?
Write the reaction equations for the acid-catalyzed dehydration of the following alcohols showing all the possible alkene products. Give the IUPAC name for each product and predict the major product in each reaction.
Draw the major, neutral organic product for each substitution reaction below
A sample containing 2.00 mol of graphite reacts completely with a limited quantity of oxygen at 25 degrees C and 1.0 atm pressure, producing 481 kJ of heat and a mixture of CO and CO2. Calculate the masses of CO and CO2 produced.
An electrical heater operating for 320 s at a voltage of 12 V and a current of 4.3 A in the same calorimeter elevated the temperature by 22.4 K. Calculate the heat capacity of the calorimeter and amount of heat released by the chemical reaction.
How many liters of water vapor can be formed by the reaction of 275.0 liters of oxygen gas and 250.0 grams of pentane? Which reactant is limiting? How many grams of the excess reactant are left over?
Calculate the molar mass of the unknown. Assume that the molal freezing point depression constant of water is 1.86C kg/mol and that the freezing point of water is 0.00C.
a student carefully diluted 25.0 ml of 6 m naoh solutionin 475 ml if distilled water. calculate the molarity of the
Propose a synthesis for the following two molecules starting from methylcyclohexane. Methylcyclohexanol and Bromomethylcyclohexane. Show all synthetic intermediates and reagents.
Identify the compounds present in the mixture and determine the percent by mass of each in the original sample. 1 Identity and % (wt/wt)= 2 Identity and % (wt/wt)=
when sulfur trioxide gas reacts with water a solution of sulfuric acid forms.express your answer as a balanced chemical
A test solution contained 2 mL of 0.10 M Ag+. A silver strip was dipped into the test solution, and a cell potential of 0.0592 V was measured against an Ag/Ag+(1.0M) reference half-cell.
A 2.914-g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temperature greater than 170 Celsius in a crucible until a constant mass is reached.
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