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what is the concentration of a household ammonia cleaning solution if 49.90 ml of .5900M HCL is required to neutralize 25.00 ml of the solution?
Nitrogen and hydrogen combine at high temperature, in the presence of a catalyst, to produce ammonia. N2(g)+3H2(g)-->2NH3(g) Assume 4 molecules of nitrogen and 9 molecules of hydrogen are present.
Analysis with an elaborate instrument indicates that substance A contains two elements. Substance B and substance C react to give a new substance D.
How long would a current of 100.0 amp need to be passed through a AlF3 electrolysis cell to produce 40.0 g of aluminum metal?
In a particular experiment, 2.25 g of NH3 and 3.75 g of O2 are placed in a container and allowed to react. How many grams of NO will have been formed when all of the limiting reactant has been consumed.
What is the limiting reagent? What is the theoretical yield of acetanilide? What is the percent yield if 3.3g of acetanilide is obtained?
Predict the rate of change in the concentration of N2O over this time interval. In other words, what is dt [N2O]/ dt?
If a sample of barium contains 2.3 x 1023 atoms of barium, how many grams of barium are in the sample?
What wavelength of light would be absorbed in raising an electron from the second level to the third level.
If the propanoate ion comes from strontium propionate, Sr(C3H5O2)2 then how many grams of strontium propanoate are needed? Assume it is completely soluble.
A 158-mg sample of Na2CO3 is dissolved in H2O to give 3.00L of solution. What is the concentration of Na+ in parts per million (ppm)?
A stock solution of perchloric acid is 70.5% by mass HClO4 and 29.5% by mass water. The density of the solution is 1.67 g·mL-1 at 20 C. Calculate the molarity of the solution.
Dissolve the appropiate amount of HEPES (sodium salt) (formula weight is 260.31) in water to an approxiamte volume of 60 mL in a 150 mL beaker that is equipped with a stirring bar.
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