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Describe what you would do to prepare 100 g of a 3.5 % solution of ammonium sulfate in water.
How many days would be required for a dose of Cu-64 to decay to 1.0% of its original concentration?
if i have 7.0 moles of gas at a pressure of 0.10 atm and at a temperature of 50.1 degrees c in a balloon what is the
A stock solution is prepared by adding 15 mL of 2.5 M Ba(CN)2 to enough water to make 23 mL. What is the CN- concentration of 10 mL of the stock solution?
how much heat does your body lose when 2.95g of sweat evaporates from your skin at 25 degrees Cecilius
Find the theoretical, percent yield and percent error of the reaction - Calculate the percent error of this reaction.
Describe another technique that could have been used to find the concentration of NaCl in the unknown solution.
What is the [H3O+] and the pH of a buffer that consists of 0.21 M HNO2 and 0.57 M KNO2? (Ka of HNO2 = 7.1*10^-4) Define What is the component concentraion ratio
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L 1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L 1 NaOH(aq) to neutralize the excess, unreacted HCl.
Calculate the fraction of Fluorine atoms at 1000 K in each of the first three electronic levels based upon the following data
A sample of oxygen collected over water at 22C and 762 torr. what is the partial pressure of the dry oxygen. Vapor pressure of water at 22C is 19.8 torr
When a metal was exposed to light at a frequency of 4.54× 10^15 s-1, electrons were emitted with a kinetic energy of 3.10 × 10^-19 J.
The following processes occur in an internal combustion engine. For which one is the entropy change negative
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