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The reactant concentration in a zero-order reaction was 9.00×10-2M after 175 s and 4.00×10-2M after 325 s. What is the rate constant for this reaction?
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)→ 2K2O(s) + 2N2(g) + 5O2(g)
On heating 5.03 g of hydrated barium chloride, 4.23 g is left behind. What is the name of this hydrate?
A solution of a dye absorbs light of wavelength 480 nm, and for this absorption, the extinction coefficient is 18600 L/mol/cm. A sample of the dye of unknown concentration is placed in an optical cell of path length 1 cm
Nitrogen gas reacts with hydrogen gas to make ammonia(NH3). 15.5 L of N2 reacts at STP to make 30 L of ammonia. What is the percent yield?
When heated, lithium reacts with nitrogen to form lithium nitride. What is the percent yield of the reaction if 13.9 of Li is heated with 33.3 g of N2 and the actual yield of Li3n is 6.64 g?
A mixture of gases containing 21.0 g of N2, 106.5 g of Cl2, and 12.0 g of He at 14 oC is in a 50.0 L container. What is the partial pressure of N2?
A bottle containing 305 g of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
Calculate what quantity of potassium chlorate that has molecular weight of 122.5 needed to form 33.6 litres of oxygen? Express your answer in grams and assume that temperature and pressue will be in normal condition?
A pound of coffee beans yields 54 cups of coffee (4 cups = 1qt ). How many milliliters of coffee can be obtained from 1g of coffee beans?
An expanding gas does 150.0 J of work on its surroundings at a constant pressure of 1.01 atm. If the gas initially occupied 68.0 mL, what is the final volume of the gas.
A 25.0 g sample of pure iron at 85.0°C is dropped into 75 g of water at 40.0°C. What is the final temperature of water-iron mixture?
titanium metal has a body-centered circle unit cell. The density of titanium is 4.50 g/cm^3 . Calculate the edge length of the unit cell and a value for the atomic radius of titanium.
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