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Question- 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 90.3 g of 32P, how much 32P was present 8.00 days ago?
Should reply all parts for five stars
At a certain temp, the solubility of strontium arsenate, Sr3(AsO4)2, is 0.0510 g/L. Explain what is the Ksp of this salt at this temp
hydrogen gas is collected over water at 21 degrees C and an atmospheric pressure of 748 mm Hg. what is the partial pressure of hydrogen gas in the mixture
What mass (in grams) of methanol (CH3OH) would need to be added to 250 grams of water to make an ideal solution with a boiling point of 104.3°C? (Kb for water is 0.512°C/m)
Pure tungsten melts at 3370 C . The liquid has a vapor pressure of 5 torr at 4337 C and of 60 torr at 5007 C calculate the normal boiling point of tungsten.
Complete the following neutralization reaction, and identify the strong acid, strong base, weak acid and/or weak base.
How to do I calculate the pH of original buffer given mass of NaC2H3O2*H2O (FW =136 g/mol) = 3.507 g
Cl2(g) + F2(g) 2 ClF(g) Kc = 19.9 For the reaction forming ClF the initial concentrations are as follows: [Cl2] = 0.5 M ; [F2] = 0.2 M ; [ClF] = 7.3 M Is the reaction at equilibrium? If not, in which direction with the reaction shift to reach eq..
A mixture of SO2 and SO2O2 and SO3 at 1000k contains the gases at the following concentrations [SO2]=5.0e-3 mol/L [O2]=1.9e-3 mol/L and [SO3]=6.9e-3 mol/L is the reacton at equilibrium. If not which way will the reaction proceed to reach equilibri..
An aqueous solution of ethylene glycol C2H6O2 is 40% ethylene glycol by mass as well as has a density of 1.05 g/ml. Explain what are the molarity, molality, and mole fraction of the solution
A 0.1000 m aqueous solution of a weak acid, HA, is 1.5% ionized. At what temperature does it freeze? Kf for water = 1.86°C/m.
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone (CaCO3). How much limestone in kilograms would be required to completely neutralize a 5.2 x 109 L lake containing 5.0 x 10-3 g of H2SO4 per liter
Question- Calculate the pH and the pOH of an aqueous solution that is 0.025 M in HCl (aq) and 0.080 M in HBr (aq) at 25 degrees C
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