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A gas mixture with a total pressure of 750 mmHg contains each of the following gases at the indicated partial pressures: CO2 , 124 mmHg ; Ar , 218 mmHg ; and O2, 197 mmHg . The mixture also contains helium gas. What is the partial pressure of the helium gas?
What mass of helium gas is present in a 13.0-L sample of this mixture at 282 K?
how many NH4Cl moles and how many NaOH moles would you need? About how many more moles of NaOH could you add before the buffer breaks down?
A 70kg skier is going down a hill that is inclined at a 12 degree angle to the horizontal. the coefficient of kinetic friction between waxed skies and snow is .05. The force of the air resistance on the skier is 15.6N. find the skiers acceleration..
Given the following thermodynamic data, calculate the lattice energy of CaBr2 (s). Term & Value Delta Hf[Ca(g)] 179; delta Hf[Ba(g)] 112; I1(Ca) 590; I2(Ca) 1145; E(Br) -325.
Determine the concentration of an unknown hydrochloric acid solution that requires 70.5 mL of 1.6 M barium hydroxide to completely neutralize
What reagents would you recommend and what mass of each one would you use to match the concentrations of Na+, Cl-, Mg2+, Ca2+ and SO42- given in the table above?
When a 6.00-g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity of 1.806 kJ·K-1, the temperature decreases by 0.440 K. Calculate the molar heat of solution of RbBr.
What is the molar solubility of magnesium carbonate ( MgCO3 ) in water? The solubility-product constant for MgCO3 is 3.5 × 10-8 at 25°C.
When you heat baking soda (NaHCO3), it breaks down into sodium carbonate powder (Na2CO3), carbon dioxide and water vapor. Write a correct thermo chemical equation and explain what it tells you about the reaction ( The enthalpy of this reaction is ..
Determine what percent by weight of sodium carbonate does it contain If the specific gravity of the sodium carbonate solution = 1.25,?
An aqueous solution containing 7.29 g of an optically pure compound was diluted to 500.0 mL with water and placed in a polarimeter tube 15.0 cm long
You want to convert 5 mL of 3-methyl-2-butanol to 3-methyl-2-butene by an acid catalyzed dehydration. In order to finalize the experimental details, you look up the physical constants in the CRC Handbook and find the following data regarding boili..
The freezing point of t-butanol is 25.50°C and Kf is 9.1°C · kg/mol. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 10.2 g sample of t-butanol is 24.59°C, how many grams of water are present in the sample?
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