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A sample of 18K gold contains the following by mass: 18.0 grams gold. 3.0 grams silver, and 3.0 grams copper. What is the percentage of gold?
What are the pH and alkalinity of these three solutions immediately after you make them
An ionic solution is investigated for identity. Using the following clues, identify the cation and the anion in the solution: a. There is only one cation and one anion in the solution
How do the structures of alcohols affect the production of Sn2 products. And how does the structure of alcohol affect the quantity of each elimination product formed
The mixture was gently stirred as the ice melted and the lowest temperature reached by the water was recorded. The cup and its contents were weighed again. The purpose of weighing the cup and its contents at the end of the experiment
Mecury has mp= -38.9 C, a molar heat capacity of 27.9J/(K.mol) for the solid, and heat of fusion =2.33kJ/mol. assuming that the heat capacities dont change with temperature, how much energy (in kJ) is needed to heat 7.5g of Hg from a temperature o..
Calculate the expected pH of the buffer after the addition of 1.0 mL of 1 M HCl. Remember that you are using 50 ml of the buffer so be sure to calculate the number of moles of acetic acid
what is the molar concentration of a solution of sulfuric acid h2so4 if 9.11 ml react completely with 0.254 g of naoh
What is the difference between the fresh meat with added sodium nitrite and the meat with added sodium nitrite plus sodium erythorbate?
What is the maximum number of hybridized orbitals that can be formed by a nitrogen atom. I know the answer is 4 but I don't understand why.
What is the pH of a 0.430 M ammonia solution. What is the percent ionization of ammonia at this concentration
consider the dissolution of mns in water ksp 3.0 times 10-14.mnss h2ol mn2aq hs-aq oh-aqhow is the solubility of
A drug is metabolized in the body by a first order rate process. If the half life for this drug in the body is two days. If 100 mg is taken define how much remains after 5 hours
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