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Ammonia NH3 chemically reacts with oxygen gas O2 to produce nitric oxide NO and water H2O. Explain what mass of nitric oxide is produced by the reaction of 7.3g of oxygen gas?
What is the approximate mass percent of cholesterol in a blood sample having a cholesterol level of 176? Why can you not give a more precise answer
a 0.2527-g sample of a mixture of mgoh2 and aloh3 was treated with 50.00 ml of 0.225 mol l 1 hclaq. the resulting
Explain why lan Forsythe, a middle-aged college professor from Boston, was in the Swiss Alps studying astronomy during his sabbatical leave. He had been there for two days as well as planned to stay the entire year.
Calculate w (in kJ) when 137 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 345 K:
A solution of sodium acetate has a concentration of 0.1 M. Calculate the pH value when 0.0025 M of HCl has been added to the solution.
An aqueous solution is six percent by mass methanol,, and has a density = 0.988 g/mL. Determine the molarity of ethanol in the solution.
Diet cola has a pH of 3.0 while milk has a pH of 7.0. Explain how many times greater is the H+ concentration in the diet cola than the milk
A scientist wants to make a solution of tribasic sodium phosphate, Na_3PO_4, for a laboratory experiment. How many grams of Na_3PO_4 will be needed to produce 350 mL of a solution that has a concentration of Na^+ ions of 1.20M
You have 277 mL of 1.25M potassium chloride solution, but you need to make a 0.50M potassium chloride solution. how many mL of water must you add to the original 1.25M solution to make the 0.50M potassium chloride solutuion
There is a one to one relationship between the number of moles of hydrogen gas evolved and the moles of Magnesium metal consumed in the reaction, therefore moles of H2 evolved = moles Mg consumed and the atomic weight of Mg = weight of Mg consumed..
One of those bands consists of radio waves with a wavelength near 20.m . Calculate the frequency of these radio waves. Be sure your answer has the correct number of significant digits.
The rate of effusion of NO2 gas during a pourous barrier is observed to be 2.88E-4 mol/h. In the same conditions, the rate of effusion of Ne gas would be how many mol/h
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