Will this cause your calculated concentrations to be high
Suppose that there is something in your sample that is absorbing at the same wavelength as the material you are looking at. Will your measured %T be too high or too low? Will this cause your calculated concentrations to be too high or too low?
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Ethylene glycol is used as automobile antifreeze. 6.38 g of this compound contains 2.47 g of carbon and 0.620 g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
If your air conditioner is more than several years old, it may use the chloroflurocarbon CCl2F2 as the heat transfer fluid. The normal boiling point of CCl2F2 is -29.8 C and the enthalpy of vaporization is 20.11 kJ/mol.
During a work-up, we are asked to interrupt vacuum, "drizzle" cold methanol over the crude product, then reestablish vacuum. What is the purpose of this step and why does the methanol need to be cold?
Suppose a reaction mixture, when diluted with water, afforded 300mLof an aqueous solution of 30g of the reaction product malononitrile[CH2(CN2)], which is to be isolated by extraction with ether.
Silver nitrate solution is mixed with sodium sulfide solution producing a black solid and sodium nitrate solution according to the balanced chemical equation:
How many times larger will the equilibrium constant be for the G +C yields G:C reaction over the A + T yields A:T reaction.
A sample of water is to be analyzed for solids content. Ten liters (10 L) of water are passed through a filter initially weighing 15 g. After drying at 105oC, the filter plus residual weighs 43 g. The filter is heated to 550oC, and the filter plus
A postulated mechanism for the reaction2N2O5 (g) →4NO2 (g) + O2 (g) consists of the following three steps.Assuming this is the correct mechanism what would the rate lawfor this reaction be?
A compound having an approximate molar mass of 120-15 g has the following percent composition bymass: carbon, 38.44%; hydrogen, 4.839%;chlorine, 56.73%.
How many liters of hydrogen gas is formed from the complete reaction of 18.9 g C? Assume that the hydrogen gas is collected at a pressure of 1.0 atm and a temperature of 350 K.
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