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when 2.05 moles of a monoatomic ideal gas is reversibly heated at constant volume from 25 degrees celcius to 45 degrees celcius the entropy change of the system is ____J*K^-1. Assume molar heat capacity of the gas is constant.
A mixture consists of 323 mg of methane, 165 mg of argon, and 223 mg of nitrogen. The partial pressure of nitrogen at 275 k is 19 kPa.
An aqueous vinegar sample contains 5.4% acetic acid by mass and has a density of 1.006 g/mL. Calculate the amount of acetic acid in grams in 2.00 L of this vinegar. Report your answer using the correct number of signi?cant ?gures.
A gas sample containing 1.47 mol at 25°C exerts a pressure of 401 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr,
2C2H6 + 7O2---> 4CO2 + 6H2O if the reaction produces 2.75 mol of H2O how many grams of CO2 are also produced?
Given the reaction: Ca + 2H2O -> CA(OH)2 +H2 What is the total number of moles of Ca needed to react completely with 4.0 moles of H2O?
From the same container under the same conditions--same temperature and initial pressure, it takes 385 s for 7.00 L of O2 gas to effuse. Calculate the molar mass (in grams/mol) of the unknown gas.
Calculate the molar solubility of Cu(OH)2, Ksp = 2.2 × 10-20, in 0.82 M NH3. Don't forget to use the complexation reaction Cu2+ + 4 NH3 ? Cu(NH3)42+, K = 5.0 × 1013.
A 44 sample of water absorbs 329 of heat If the water was initially at 21.7, what is its final temperature.
Calculate the heat of enthalpy for the reaction: PCl5(g) → PCl3(g) + Cl2(g)
I'm working on a Lewis Structures sheet. After we have completed the structures, which i have, we need to predict the shape of the molecule in VSEPR. What is the shape of a C2H6 amd a C2H4 molecule in VSEPR?
What is a significant obstacle when using osmometry to determine molar masses for compounds with very high molar masses? A. The osmotic pressures may be too high to measure.
Three sparingly soluble salts, MA, MA2, and MA3, all have Ksp = 1.5 x 10-7. Determine which of these three has the highest molar solubility in water? a) MA, b) MA2, c) MA3 ,d) They are all equally insoluble.
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