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What is the diameter, in micrometers, of a spherical ink droplet from an early version of an ink-jet printer if the volume of the droplet is 200 ± 10 pL? If the ink has a density of 1.1 g/mL, what is the mass in milligrams of ink in a droplet from this printer? Is ?milligrams? an appropriate unit for describing this mass?
A white solid remains in centrifuge tube after acetone extraction-it fizzes when hydrochloric acid is added suggesting sodium carbonate was formed- How did it form? Write a balanced equation for the formation?
Calculate the mass of ethylene glycol required to lower the freezing point of 200 mL of water/ice by 4.5 degrees celsius. The K(f) for H20 is 1.86 degrees celsius/m. Assume the density of water is 1.00 g/ml.
What is the pressure in a 17.1 L cylinder filled with 47.9 g of oxygen gas at a temperature of 341 K?
Gaseous hydrogen iodide is placed in a closed container at 425 degree celcius, where it partially decomposes to hydrogen and idine: 2HI(g)--->--->H2(g)+I2(g). At equilibrium it is found that (HI)=3.53*10^-3 M,(H2)=4.79*10^-4M, and (I2)=4.79*10^-4M..
A molecule of N2 in air travels at about 1000 ft/sec. If the supersonic transport Concorde travels at 1500 miles/hour, how fast does it travel in ft/sec? (1 mile = 5280 ft)
What mass in grams of carbon dioxide is produced if 85.0 mol of magnesium carbonate, MgCO3, are heated and allowed to decompose according to this equation? MgCO3(s)--> MgO(s) + CO2(g)
Which has the lowest freezing point: CaF2, (NH4)3PO4, C6H12O6, or NaNO3?
Methane and hydrogen sulfide form when 36g H2 reacts wih carbon disulfide, calculate the percent yield if the actual yield of CH4 is 69.8g.
The amount of boiling water required to raise the temperature of 25 kg of water in the bath to body temperature is 4.8 kg. In this process, the heat lost by the boiling water is equal to the heat gained by the room-temperature water.
Write the balanced equation for the complete combustion of each of the following compounds
Starting with only the solid, it is found that at 40 degrees Celsius the total gas pressure is .563 atm. Calculate the partial pressure of NH3 and CO2.
A sample of pure NO2 is heated to 388C at which temperature it partially dissociates according to the equation.
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