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The pressure of an unknown gas is measured with a manometer. Instead of mercury the manometer is filled with a liquid (X) whose density is 0.673 g/cc. The pressure is measured as 591 mmX. What is the pressure in mmHg?
What mass (in grams) of solid KCl would need to be added to 500 grams of water to make an ideal solution with a boiling point of 106.8
If solar radiation is 1010 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 for solar radiation.
To whats volume in liters must 105 mL of hydrochloric acid containing 47.5g of HCl be diluted to make a 1.05M solution ?
If 5 mL of the original unknown sample was diluted to 200 mL prior to analysis, what is the concentration of Li+ in the original solution?
A scientist wants to make a solution of sodium phonsphate for a lab experiment. How many grams of sodium phosphate will be needed to produce 475 ml of solution that has a concentration of Na+ ions of 1.50 M?
For a reaction at equilibrium, which of the following is the best way to think about it?
The empirical formula of a compound is found to be P2O5. Experiments show that the molar mass of the compound is 560g/mol. What is the molecular formula of the compound?
How long would you need to sample from a concentration of 1000 PPM using a flow rate of 50 ml/minute to collect 100 mg of material?
A tank contains helium gas at 490. mmHg, nitrogen gas at 0.750 atm, and neon at 520. torr. What is the total pressure in atm?
A 100 g sample of an unknown liquid absorbs 2000 J of heat energy, raising the liquid's temperature from 50 ?C to 70 ?C .What is the speci?c heat capacity of this liquid.
what is the total pressure in a cannister that contains oxygen gas at a partial pressure of 804 mm Hg, nitrogen at a partial pressure of 220 mmHg, and hydrogen at a partial pressure of 445 mmHg.
How many grams of NaCl must be added to 250g water to lower the vapor pressure by 1.30 mm Hg at 40 degrees C assuming complete dissociation?
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