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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. What are the empirical and molecular formulas of ethylene glycol?
Once equilibrium is reached, the final temperature of the water-metal mixture is 28.2oC. What is the identity of the metal
calculate the pressure exerted by ar for a molar volume of 1.42l mol-1 at 300.0 k using the van der waals equation of
The vapor pressure of liquid mercury is 0.2729 torr at 100.0 oC and 246.80 torr at 300.0 oC. calculate delta H of vaporization of mercury. calculate the normal boiling point of mercury
Write the balanced formula unit equation for the reaction of tetraphosphorus decoxide, P4O10, with water to form an acid
A piston has an external pressure of 5.00 atm. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.540 liters.
Outline a detailed scheme utilizing extractions that he can use to separate the mixture back into the pure components before the professor finds out.
Because of its semiconducting properties CdS, is sometimes used in electronic devices. The band gap energy for CdS is 2.40 eV. What is wavelength of a photon with this energy?
A 25.0-mL sample of 0.150 M hydrazoic acid is titrated with a 0.150 M NaOH solution. What is the pH after 13.3 mL of base is added. The Ka of hydrazoic acid is 1.9 x 10^-5.
You dilute 1g of the soap 1:106 and plate it on standard plate count agar. After 24 hours of incubation, there are 168 colonies. How many bacteria were on the soap? How did they get there?
A 2.770 g sample of a compound containing only carbon, hydrogen, and oxygen burns in excess oxygen to produce 4.06 g of CO2 and 1.66 g of H2O. Calculate the mass (in g) of C in the sample.
a perfect percent yield would be 100. for each reaction comment on your degree of accuracy and suggest possible sources
If 13.93 mL of NaOH solution is required to reach the stoichiometric point, what is the molar concentration of the sodium hydroxide solution?
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