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The Ca content of a powdered mineral sample was examined four times by two methods believed to have similar precision. The results are shown below. Explain are the mean values for these two methods the same at the 90% confidence level?
Method 1: Methhod 2:0.0271 0.02710.0282 0.02680.0279 0.02630.0271 0.0274
write the balanced equation for the combustion of isooctane (C8H18) to produce carbon dioxide and water. Use the smallest possible integers to balance the equation.
The density of the unknown is 0.714g/mL. The Kf of nitrobenzene is 6.87 ^0C/m. Calculate the molar mass of the unknown.
A mixture of 0.100 mol of CO2, 0.050 mol of H2, and 0.100 mol of H2O is placed in a 1.00 L vessel and reacts according to the reaction shown below. CO2 + H2 --> CO + H2O
Calculate the solubility product constant for Pb(IO3)2 (4.3 x 10^-5 M), given that the molar concentration of saturated solution is as indicated in parenthesis.
calculate the equilibrium constant for this reaction at 25 C Part II at what temperature is this reaction spontaneous. Br2(I) Br2(g) delta H = 31.0 Kj/mol' delta s = 93.0 J/K.mol
Given the quantities of chemicals used in this recipe
Consider a compound that undergoes sublimation at 125 degrees Celsius and a pressure of one atm. Which of the following could be a heating curve appropriate for heating
Naphthol with diethyl ether, 2-chloro-benzoic acid and then aqueous sodium bicarbonate? Will any substance not do anything
CH3CH2OCH2CH3 can be synthesized by an SN2 reaction. Draw the structures of the alkyl chloride and nucleophile that will give this compound in highest yield
an ethylene gas torch reqires 3200 L of gas at 3.00 atm. what will be the pressure of the gas if ethylene is supplies by a 250. L tank?
What mass of carbon dioxide is present in 1.00 m3 of dry air at a temperature of 25c and a pressure of 731 torr
Boron nitride, BN, has a graphite-like layered structure in which the layers have eclipsed alignment where the B and N atoms in alternative layers in the direction perpendicular to the layers.
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