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How many moles of atoms are in each of the following? 4.1*10^24 Pb atoms ,2.15*10^22 He atoms
Determine the volume of the methane at STP if bacterial culture isolated from sewage produced 35.5 mL of methane, CH 4 , at the temperature of 31 degree Celsius and at pressure of 753 mmHg.
The complete combustion of acetylene, C2H2(g), produces 1300. kJ of energy per mole of acetylene consumed. How many grams of acetylene must be burned
An unknown compound contains only carbon, hydrogen, and oxygen (C_xH_yO_z). Combustion of 5.50 of this compound produced 8.07 of carbon dioxide and 3.30 of water.
The element boron has two naturally occurring isotopes with masses of 10.0129 amu and 11.0093 amu. What is the percent abundance of the second isotope?
A mixture of CO, CO2 and O2 is contained within a 275 mL flask at 0C. If the total pres- sure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr, what is the partial pressure of O2?
Determine the precipitate that forms if silver nitrate aqueous solutions and KCl react to produce products in a double-replacement reaction.
The manometer shown below measures the pressure of the water in the tank. Using variables for the densities (no values given), find the gage pressure at point A.
An electron microscope employs a beam of electrons to obtain an image of an object. What energy must be imparted to each electron of the beam to obtain a wavelength of 10.0pm? Obtain the energy in electron volts (eV) (1eV= 1.602x10^-19J )
If you look at a reaction for an esterification reaction, you cannot tell where the oxygen comes from (acid or alcohol). Draw the mechanism of this reaction, and devise an experiment using the mechanism and O18 (O18 isotope) to help prove unequivo..
During the combustion of 5.0 g of octane, C8H18, 239.5 kcal is released. How many grams and how many moles of octane must be burned to release 450 kcal?
Determine the mass of solid sodium formate of MW 68.0 must be combined to 150 mL of 0.66 mol/L
The pressure in an automobile tire is 1.83 atm at 26.0°C. What will be the pressure if the temperature warms up to 37.0°C.
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