What is the concentration of na+ in parts per million
A 184-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)?
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A copper refinery produces a copper ingot weighing 75 kg. the density of the copper is 8.94 g/cm^3. if the copper is drawn into a wire whose dimeter is 8.250mm,how many feet of copper can obtained from the ingot? b) what is the volum of the copper
Ferrophosphorus (Fe2P) reacts with pyrite (FeS2) producing iron(II) sulfide and a compound that is 27.67% P and 72.13% S by mass and has a molar mass of 444.56g/mol. Write a balanced chemical equation for this reaction.
A vehicle pulls out onto a single lane highway that has a flow rate of 280 veh/hr (poisson distributed). The driver of the vehicle does not look for oncoming traffic.
The number of moles in .452 grams of NaClO4, the number and type of particle in .452 grams of NaClO4, is it possible for NaClO4 to be soluble in water.
If the height of the mercury column in the leveling bulb is 30 mm greater than that in the gas buret and atmospheric pressure is 670 mm, what is the pressure on the gas trapped in the buret?
Ammonia (NH3, Kb = 1.8 x 10^-5) is added to 100 mL of water at room temperature. The vapor pressure of the water above the solution drops to 0.03 atm. What is the pH of the solution in the limit that any gas phase NH3 is negligible?
What is the freezing point of a benzene solution containing 400 g of benzene and 200 g acetone (C3H6O)? Kf for benzene is -5.12 C/m. The freezing point of pure benzene is 5.5 degrees Celcius.
Vehicles begin to arrive at a toll booth at 850 am with an arrival rate of x(t) = 4.1 + .01t (with t in min and x(t) in veh /min.) The toll booth opens at 9am and processes vehicles at a rate of 12 per minute throughout the day.
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Problem: Our company's product line is almost as big as the competition. Multiple choice question.
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