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Automobile air bags inflate during a crash or a sudden stop by the rapid generation of nitrogen gas from sodium azide, according to the reaction:
2 NaN3(s) ----> 2 Na(s) + 3 N2(g)
How many grams of sodium azide are needed to provide sufficient nitrogen gas to fill a 30.0 x 30.0 x 25.0 cm bag to a pressure of 1.20 atm at 1.0 x 10^1 degrees celsius?
Eather at room temperature is placed in a flask connected by rubber tubing to a vacum pump, and the pump is turned on, and the ether begins boiling. Explain.
How to Separate and isolate following compounds: 50% ethyl 4-aminobenzoate, 40% of benzoin, and, 10% 1-4 dibromobenzene.
Calculate the percent composition of copper in the hydrate CuSO4.5H2O based on atomic weight data.
Calculate the equilibrium constant for the photodecomposition of ascorbic acid (vitamin C) in a poorly packaged fruit, such as guava. 165g of guava contains 0.377g of ascorbic acid.
In a study designed to prepare new gasoline-resistant coatings, a polymer chemist dissolves 6.099 g poly(vinyl alcohol) in enough water to make 100.0 mL of solution. At 25°C, the osmotic pressure of this solution is 0.242 atm. What is the molar ma..
calculate the value for E for the cell at 25oC (b) A current is drawn from the cell until 1.20 g of silver have been deposited at the silver electrode. Calculate the value of E for the cell at that stage of operation.
Calculate the density of hydrogen sulfide gas, H2S, at 58°C and 896 mm Hg. Obtain the density in grams per liter.
Caffeine is basic. Show the reaction of caffeine with aqueous hydrochloric acid to give caffeine hydrochloride. (reaction is at the tertiary amine nitrogen, not the amide ones). Show all mechanism arrows
The reactant concentration in a zero-order reaction was 0.100 M after 130 s and 2.50×10^-2 M after 325s . The rate constant for this reaction is 3.85x10^-4 M/s. What was the initial reactant concentration for the reaction described in Part A
A solution is prepared at 25 degrees Celsius between 150 mL of 0.15 M C6H5COOH and 12.5 grams of C6H5COONa. What is the resultion pH of the solution, assuming no volume change.
How many grams of the excess reactant remain after the limiting reactant is completely consumed
Lakes that have been acidified by acid rain (HNO3 and H2SO4) can be neutralized by a process called liming, in which limestone (CaCO3) is added to the acidified water. What mass of limestone (in Kg) would completely neutralize a 15.5 billion-liter..
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