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A lawn fertilizer is rated as 7.35% nitrogen, meaning 7.35 g of N in 100 g of fertilizer. The nitrogen is present in the form of urea, (NH2)2CO. How many grams of urea are present in 100 g of the fertilizer to supply the rated amount of nitrogen?
50 g of aluminum oxide is produced in the reaction of aluminum metal and oxygen gas at STP. How many liters of oxygen gas were reacted?
A person ate 0.999 pound of cheese (an energy intake of 7990 kJ). Suppose that none of the energy was stored in his body. What mass (in grams) of water would he need to perspire in order to maintain his original temperature? (It takes 44.0 kJ to v..
A sample of gas with a mass of 1.58 occupies a volume of 941 at a pressure of 753 and a temperature of 16. What is the molar mass of the gas.
Given the following vapor pressures at 20 degrees Celsius, arrange the compounds in order of increasing boiling point: butane, 1,650 mm Hg; acetaldehyde, 740 mm Hg; Freon-113, 284 mm Hg.
Make a list of the operations you will need to perform in order to display a spectrum of your food dye on the spectrophotometer
Problem- Draw complete mechanisms that explain the product distributions when NH4Cl and NH4Br are mixed with 1-butanol and 2-methyl-2-propanol
In ethanol, with an absorbance of 1.210 (no units) at a wavelength of 530 nm. At this wavelength, the extinction coefficient of rhodamine 6G in EtOH is 116,000M^-1 cm^-1. If I have a 0.100 M solution of rhodamine 6G, what pathlength cell will be n..
Question- How many grams of solid NaCN have to be added to 1.4 L of water to dissolve 0.16 mol of Fe(OH)3 in the form of Fe(CN)63. (For simplicity, ignore the reaction of CN? ion with water.)
A sample of ideal gas is in a sealed container. The pressure of the gas is 695 torr, and the temperature is 27 degrees celsius. If the temperature changes to 84 degrees celsius with no change in volume or amount of gas, what is the new pressure,P2..
If the pollutant to be removed has a concentration of 100 mg/L and decays by 1st-order kinetics with a rate coefficient of 2.25 d-1, what percent removal is achieved if one uses the theoretical hydraulic retention time of the reactor. What percent..
A solution of an unknown nonvolatile electrolyte was prepared by dissolving 0.250 g of a substance in 40 g of CCl4. The boiling point of the resultant solution was 0.357 degrees Celsius higher than that of pure solvent. Calculate the molar mass of..
A Geiger counter is placed 1cm from a radioactive spill and gives a reading of 12,000 cpm. At what distance is the intensity of radiation 40 cpm
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