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What advantage does such compartmentalization offer a large cell and what are two examples of oraganelles and the activities they compartmentalize?
An auto technician spills 85 mL of 2.6 M H2SO4 solution from a rebuilt auto battery. How many milliliters of 2.5 M NaHCO3 must be poured on the spill to react completely with the sulfuric acid, making
calculate avaerage rate of decomposition of H2O2 between 0 & 4.32 x 10^4 s.
Suppose 321 grams of methylamine (CH3NH2) and 332L of oxygen gas are mixed together in the reaction below at STP. how many grams of water should be prouduced?
A 48.4 mL sample of gas in a cylinder is warmed from 19 degrees Celsius to to 88 degrees Celsius. what is its volume at the final temperature?
A .350 g sample of a biomolecule was dissolved in 15.0 g of chloroform, and the freezing point depression was determined to be .240 degree celcius. Calculate the molar mass of the biomolecule?
A liquid unknown was found to be soluble in cyclohexane and alcohol; the unknown was found to have a boiling point of 58 C at 670 mm Hg. What is the substance? What could you do to confirm your answ
Under water where the temperature is 17C and the pressure is 394 kPa, a diver inhales 2.1 L of air from his SCUBA tank.
WebAssign will check your answer for the correct number of significant figures. 4Your answer was incorrect, but has changed from what was graded.%
Calculate the molarity and mole fraction of acetone in a 1.06 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that
How many grams of acetylene are produced by adding water to 48.3 g CaC2 ?
Use the initial volume of acetic acid, the volume of NaOH required to reach the equivalence point and the value of the molarity of NaOH that you obtained when you standardized this solution against
How many calories are needed to raise the temperature of a 45.0 g sample of iron from 15 degree celisus to 25 degree celsius? iron has a specific hear of 0.108 cal/c
Calculate ΔG for this reaction under the following conditions (assume an uncertainty of 1 in all quantities, calculate all thermodynamic values from Appendix 4 for all parts of the problem).
If 153 mL of wet H2 is collected over water at 24°C and a barometric pressure of 729 torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr at 24°C.)
A reaction mechanism involving three steps is shown below. Identify all of the catalysts in the following mechanism.
How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 485 g of sulfur tetrafluoride?
Acetylene gas undergoes combustion to produce carbon dioxide and water vapor. if 75.0 L of co2 are produced how many liters of acetylene are required?
A 25.6 g sample of pure iron at 66°C is dropped into 65 g of water at 33°C. What is the final temperature of the water-iron mixture?
The total pressure in the system at equilibrium is 3.0 atm. A separate measurement shows that the mole fraction of O2 at equilibrium is 0.12. Calculate the partial pressure, in atm, of SO2 at equilib
How many moles contain each of the following? 1.25 x 10^15 molecules CO2 3.59 x 10^21 formula units sodium nitrate
Stock solution is prepared by adding 28 mL of 0.2 M Na3PO4 to enough water to make 76 mL. What is the PO43- concentration of 55 mL of the stock solution?
Calculate the mass of nitrogen dissolved at room temperature in an 82.0 {rm L} home aquarium.Assume a total pressure of 1.0 {rm atm} and a mole fraction for nitrogen of 0.78.
How many millimeters of HNO3(aq) are needed to react completely with a 0.2800 gram piece of copper wire according to reaction: 3 Cu (s) + 8HNO3(aq)----> 3 Cu (NO3)2(aq) + 2 NO(g) + 4 H20