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A gas mixture contains each of the following gases at the indicated partial pressures: N2, 335 torr; O2, 124torr ; and He, 209 torr . What is the total pressure?
What mass of each gas is present in a 1.00 - L sample of this mixture at 25.0 C ?
Enter your answers numerically separated by commas.
osmium has a density of 22.6 g/cm3. what volume (in mL) would be occupied by a 21.8 g sample of osmium?
Define buffer capacity and explain why the buffer capacity reaches a maximum when pH=pKa
What is the sum of the coefficients in the balanced equation that represents the complete combustion of the relatively new gasoline additive "MTBE," for which the molecular formula is C5H12O?
How many amps are required to produce 72.5 g of potassium metal from a sample of molten potassium chloride
Describe the preparation of 1 liter of a 0.75M acetate buffer, pH 4.50, starting from a 1.50 M solution of acetic acid and solid KOH pellets, M.W.=56 (pKa=4.75)
Identify the statements that accurately describe how hydrogen ion concentration relates to energy production in oxidative phosphorylation. ATP synthase provides energy in the form of ATP to actively transport H+ into the mitochondrial matrix.
find the molar mass of the unknown. 16.6 degrees C freezing point acetic acid and 3.90 degrees C*kg/mol?
How many grams of Fe(NO3)3 · 9 H2O are required to prepare 300.0 mL of a 0.249 M solution of Fe(NO3)3 · 9 H2O?
A sample of oxygen occupies 10.0 L at 4.00 atm pressure. At what temperature will the pressure equal 3.00 atm if the final volume is 8.00 L.
A graduated cylinder contains 155 mL of water . A 15.0-g piece of iron (density = 7.86g/cm^3) and a 20.0-g piece of lead (density = 11.3 g/cm^3) are added. What is the new water level, in milliliters, in the cylinder? motion commented
What is the main structural feature of the azo dyes that causes them to be colored compounds? Methyl Orange is an acid-base indicator. In dilute solution at pH greater than 4.4, it is yellow.
Draw the flow of e- and the products of the Methoxide Ion and water including formal charges on all compounds.
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