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An element has a half life of I month. Given 1000 radioactive atoms, how many radioactive elements will remain after 3 months?
a) 333 b) 500 c) 250 d) 125 e) 62
Use the observations and arrange the following five reduction half-cell reactions in order, the one with the largest positive reduction potential listed first.
Silver chloride, often used in silver plating, contains 75.27% .Calculate the mass of silver chloride in grams required to make 4.4 of silver plating.
Calculate the number of molecules of AsCl3 that would be in 1 mL of Solution C at this concentration. Look at your answer. This is the average number per mL. But what is the most likely number (ie integer) of molecules of AsCl3 in 1 mL?
A calorimetry experiment determined that the combustion of 1.01 g of H2 reacting with excess O2 producing H2O gave q=143 kJ. Calculate the change in enthaply.
You are asked to prepare an aqueous solution of ethylene glycol (HOCH2CH2OH) with a mole fraction of 0.142.
Consider the cell described below: Al/Al3+ (1.00M)//Pb2+ (1.00M)/Pb Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by .60 mol/L. Assume T=25 C
A syringe containing 1.64mL of oxygen gas is cooled from 95.9°C to 0.8°C. What is the final volume of oxygen gas?
orbits around a definite point in space made of neutrinos and electrons D) is not a definite point in space, but rather it is a cloud of smaller particles called quarks that deflect alpha particles
A reaction has a rate consant of 1.23/mol*s at 433 Celcius and 24/mol*s at 533celcius.
A student takes 185. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
A certain pesticide is fatal to fish fingerlings at a level of 0.5 parts per million in water. A leaking metal can containing 10.0 kg of the pesticide was dumped into a stream with a flow of 10.0 Liters per second moving at 0.7 km/hr.
What is the rate law for step 2 of this reaction? Express your answer in standard MasteringChemistry notation. For example, if the rate law is type k*[A]*[C]^3.
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