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The density of air at ordinary atmospheric pressure and 25 degrees C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 10.0 X 13.5 X 10ft
An unknown compound contains only C, H, and O. Combustion of 5.50 g of this compound prodced 11.0 g of CO2 and 4.50 g of H2O. What is the empirical formula of the unknown compound.
Compare and contrast solid-phase DNA synthesis with enzyme-catalyzed DNA synthesis. Please separately describe the similarities and differences between the two.
A gaseous compound containing hydrogen and carbon is decomposed and found to contain 82.66% carbon and 17.34% hydrogen by mass. The mass of 158mL of the gas, measured at 556 mm Hg and 25 degrees C is found to be .275 g. What is the molecular formu..
A 475 mL sample of gas is collected over water at 27°C and a total pressure of 675 mm Hg. If the vapor pressure of water at 27°C is 26.7 torr, what is the volume of the gas sample at standard pressure?
A piece of metal with a mass of 151 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 35 mL. What is the density of the metal?
Triethyloxonium Tetrafluoroborate, (CH3CH2)3O+ BF4 - is a solid with melting point 91-92 degrees Celsius. Show how this reagent can transfer an ethyl group to a nucleophile (Nuc:-) in an SN2 reaction.
The minimum energy required to cause the photo electric effect in potassium metal is 3.69*10^-19 J. will photoelectrons be produced when light shines on the surface of potassium?if 400 nm radiation is shone on potassium,what is the velocity of the..
Add charges, single electron dots, and/or pairs of dots as appropriate to show the Lewis symbols for the most stable ion of each element. Treat as the valence shell in all cases. To add formal charges, click the button below (which will turn yello..
what is the product of the reaction of CsCl and SnCl4 and what is the role of cesium chloride in the reaction
Rank the following elements in order of increasing ionization energy and increasing atomic size: P, O, S.
A certain sample of the mineral galena weighs 12.4 and has a volume of 1.64 mL. What is the density of galena?
Weigh 3.503g of NaC2H3O2*3H2O and add it into a 150mL beaker. Pour in 8.8 mL of 3M acetic acid. Pour in 55.6 mL of distilled water and add it to the mixture and stir the solution.
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