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a star is estimated to have a mass of 2*10´36 kg. Assuming it to be a sphere of average radius 7 * 10´5 km, calculate the average density of the star in units of grams per cubic centimeter.
A sample of a new compound is burned in an excess of air to produced CO2 and H2O. If 0.468 g of the sample produce 0.458 g of CO2 and 0.094 g of H2O and the molar mass is about 230, what is the likely molecular formula of this compound?
Molecules can be as small as a few atoms or as large as thousands of atoms. In 1962, Max F. Prutz and John C. Kendrew were awarded the Nobel Prize for their discovery of the structure of hemoglobin.
Determine how long will it take for the concentration to decrease to 0.13 mol/L express your answer in seconds.
Determine the root-mean-square speed of CO2 molecules that have an average kinetic energy of 4.21*10^(-21) J per molecule.
A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O. In another experiment it is found that 0.103 g of the compound produces 0.0460 g of NH3
Elemental exonium (not a real element) consists of two major isotopes Abundance Mass 55% 98 amu, 45% 114 amu What is the atomic weight for exonium? Answer in units of amu
If an automobile is able to travel 242 mi on 12.0 gal of gasoline, what is the gas mileage in km/L
Considering the given equation 4 C3H5N3O9---> 6 N2+ 12 CO2 + 10 H2O + O2,This reaction generates many gaseous products and a large amount of heat determine what is the maximum amount of Oxygen.
Draw all stereoisomers having molecular formula C6H12 that contain one double bond and give the IUPAC name for each compound.
An Ideal gas originally at a temperature T1 and pressure P1 is compressed reversibly against a piston to a volume equal to one-half its original volume, Draw a diagram of the process in the P-V plane.
What is the ee?, The optical rotation of a compound is -165. What is the ee for a solution mixture with a measured rotation of -50?
if 2.29 moles of argon gas are added to 3.5L of a 6.58 mole sample of argon gas what is the final volume
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