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A bag of fertilizer is labeled 15-20-5 (nitrogen-phosphorous-potassium). What is the actual percentage of phosphorous in the fertilizer?
While mercury is very useful in barometers, mercury vapor is toxic. Given that mercury has a DHvap of 56.9 kJ/mol and its normal boiling point is 356.7°C, calculate the vapor pressure in mm Hg at 25°C. the answer is 4.29 x 10-3 mm Hg
a gas is confined to a cylinder under constant atmospheric pressure. when 415 j of heat is added to the gas it expands
What is the heat of combustion of the glucose expressed in kJ/mol C6H12O6? (1) +2.80x10^3 kJ (2) -2.80x10^3 kJ (3) -15.6 kJ (4) +65.4 kJ (5) -65.4 kJ The correct answer is B, however
If the heat of combustion for a specific compound is -1100.0 kJ/mol and its molar mass is 75.49 g/mol, how many grams of this compound must you burn to release 390.70 kJ of heat
As a result of photosynthesis, 1.0 kg of carbon is fixed per square meter of forest. Assuming air is 0.046% CO2 by weight, what volume of air is required to provide 1.0 kg of fixed carbon
proportional only to the numbers of hydrogens that give each product when substituted for by chlorine. What would be the relative yield of each product?
Is there a chart that shows the solubility of SrSO4 in water verses temperature and PH
A 100-mL sample of the juice took 9.58 of the iodine solution to reach a starch end point. What is the concentration of Vitamin C.
What is the difference in entropy between ethanol's liquid and gaseous states at 351.44 K? What I'm asking is what is the size of the "jump" on the Sm versus Temperature curve.
Rubidium chloride has the rock salt structure. Cations and anions are in contact along the edge of the unit cell, which is 658 pm long. The radius of the chloride ion is 181 pm. What is the radius of the Rb+ ion?
The ratio of effusion of an unknown gas is measured to be 24.0ml/min. Under the same conditions, the rate of effusion of pure methane gas is 47.8ml/min. What is the unknown gas?
Suppose we redefine the standard state as P=2 atm find the new standard state ^Gf values of the following substances
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