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1. A 1.0 L sample of a gaseous compound of hydrogen, carbon, and nitrogen gave upon combustion 2.0 L of CO2, 3.5 L of H2O vapor, and 0.50 L of N2 (with all gas volumes measured at the same T and P). What is the empirical formula of the compound?
2. A 6.01 g sample of a gaseous carbon-hydrogen compound is found to contain 4.80 g C and 1.21 g H. At STP, 762 mL of the gas has a mass of 1.02 g. What is the molecular formula of the compound?
3. An adult takes about 15 breathes per minute with each breath having a volume of 500 mL. If the air that is inhaled is dry, but exhaled at 1 atm is saturated with water vapor at 37°C, what is the mass of water lost from the body in one hour. The vapor pressure of water at 37°C is 47.1 torr.
The reversible chemical reaction A+B C+D with an equilibrium constant of K 7.1.Initially, only A and B are present, each at 2.00 . What is the final concentration of once equilibrium is reached?
3.24 x 10-3 g of a protein was dissolved in water (total vol. of 5.00 mL). Given the osmotic pressure of the solution was 1.50 x 10-3 atm and the temperature is 298.0K, calculate the molar mass of the protein.
Hexane is used to wash the solid product of a Sn1 carbocation reaction why is ice cold hexane used? and why does it need to be ice cold?
describe the difference between what the retina does and what the striate cortex does?
What is a likely mechanism for the reaction below: (2Z)-7-methylocta-2,6-dienal using heat and a hydroxyl to form 6-methylhept
0.250 g of a binary unknown acid, HX, requires 31.96 mL of a 0.09668M NaOH solution when titrated. What is the identity of the unknown acid.
when a blue copper(II)nitrate solution is mixed with a colorless solution of sodium sulfide
Which anion gives precipitate with Ba+2 ion? Iv) Which anion evolves a gas when acid is added? V) Which anion releases an odorous gas as a product?
What is the bubble point temperature at 2 atm. What is the dew point at 2 atm. What is the temperature if 50mole % is vapor?
At a certain temperature and pressure 2.8 L of N2 reacts with 4.2 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced
Methanol undergoes combustion in oxygen to make Carbon Dioxide Gas & Liquid Water. Find Standard Enthalpy of Reaction?
what is the minimum number of Kilo Joules needed to change 40 grams of water 100 C to steam at the same temperature and pressure?
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