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Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If you begin with 46.5 mg of this isotope, what mass remains after 86.8 hours have passed? Since the decomposition is a radioactive decay reaction, it is first order.
A 0.1236-g sample of an unknown monoprotic acid was dissolved in 25.8 mL of water and titrated with 0.0680 M NaOH solution. The volume of base required to bring the solution to the equivalence point was 19.1 mL.
A 24mL solution containing 8mM thiocyanate (SCN-) is titrated with a 6mM solution of silver (Ag+). Determine the concentrations of thiocyanate and silver free in solution at each of the titration volumes listed below
A 40.0 mL sample of 0.150 M Ba(OH)2 is titrated with 0.400 M HNO3. Calculate the pH after the addition of the following volumes of acid, and plot the pH versus milliliters of HNO3added.
What is the maximum number of tablets you can take safely. Each of your generic tablets is 800 mg and contains 95% CaCO3 by mass. The 940 mL volume of your stomach is completely full of acid and water. You are too weak to split tablets so report yo..
A one-mole sample of a monatomic perfect gas with a constant pressure heat capacity of 20.85 J/(K mol) is initially at a pressure of 3.25 bar at 200 K. It undergoes an adiabatic reversible expansion until its pressure is 1.52 bar. Calculate: q, w,..
To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 2.20 mol of gas D measured at 251 C in a 1.75-L container assuming ideal behavi..
When you calculate the molarity and molality of the EDTA solution are the values very similar or not. Explain if this is what you might expect for a dilute aqueous solution with a density very close to 1.0 g/mL.
For the reaction: V2O5 + 6HCL---> 2VOCL3 + 3H2O If 13.65g of VOCl3 was produced in this reaction, how many grams of V2O5 were reacted in excess HCL
Calculate the total ionic concentration of a weak acid and a weak base (knowing their conductivities) by setting up a proportion with the total ionic concentration and conductivity of a strong acid and a strong base. Basically, we ran out of time and..
Explain the structure for 4-ethyl-2,3-dimethyl-2-heptene?
one of the allotropes of sulfur is the orthorhombic form formula s8 8 is a subscript which is a brittle yellow solid.
(A) What mass of Potassium hydrogen carbonate is needed? (B) What volume of 0.32 M HCl is needed to react completely with the amount of potassium hydrogen carbonate from 2(a)
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