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An empty 3.60L steel vessel is filled with 1.25atm of CH4(g) and 5.00atm of O2(g) at 300 ? C. A spark causes the CH4 to burn compl etely, according to the equation: CH4(g)+2 O2(g)?CO2(g)+2H2O(g) ?H? = -802 kJ What is the final temperature inside the vessel after combustion, assuming that the steel vessel has a mass of 13.695kg , the mixture of gases has an average molar heat capacity of 21J/(mol??C), and the heat capacity of steel is 0.499J/(g??C)?
Methyl red (Ka = 7.9 x 10^-6 is added to a buffered solution of unknown pH. Spectrophotometric measurements show the ratio of the basic to the acidic form of the indicator to be 2.57 to 1.000. Calculate the pH of the buffer solution.
In an experiment you combine 4-methyl-2-pentene and water, in the lab you setup the experiment using a a heater, condenser and N2 gas and add the reagent H2SO4
The compound noradrenaline contains 56.79% C, 6.56% H, 28.37% O, and 8.28% N by mass. What is the empirical formula for noradrenaline?
The volume of a drop of rain was found to be 0.448 ml at N.T.P. How many molecules of water and number of atoms of hydrogen are present in this drop.
Radio station KLBJ broadcasts at a frequency of 93.7 × 106 s-1. Determine the length of the waves that corresponds to this frequency.
The first-order decomposition of phosphene to phosphorus and hydrogen 4PH3(g) → P4(g) + 6H2(g)
How many grams of cholesterol are in 230 mL of blood? The concentration of cholesterol (C_27H_46O) in blood is approximately 5.0mM.
Calculate (a) the mole fraction of the solute, (b) the number of moles of solute in the solution, and (c) the molecular mass of the solute.
A glucose solution contains 51.0 g of glucose in 475 g of water. What is the freezing point?
The elemental mass percent composition of malonic acid is 34.63% C, 3.87% H, and 61.50% O. Determine the empirical formula of malonic acid. Express your answer as a chemical formula.
for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 425mL of a solution that has a concentration of Na+ ions of 1.50M?
Calculate the molarity of a 97.12 wt% acetic acid solution given that the solution density is 1.05 g/mL
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