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Suppose that the microwave radiation has a wavelength of 12.7 cm. How many photons are required to heat 200. mL of coffee from 25°C to 62°C?
what is the formula for the compound that crystallizes with a cubic closest packed array of sulfur ions and that contains zinc ions in 1/8 of the tetrahedral holes and aluminum in 1/2 of the octahedral holes
She weighed an empty 4.3 L bulb, then filled it with the gas at 1.60atm and 23.0 C and weighed it again. The difference in mass was 7.9g . Identify the gas.
What is the density of gold if a ring with a volume of 2.656 cubic centimeters has a mass of 51.26 grams?
Which one of the following substances will exhibit both dispersion and dipole-dipole forces between molecules in the condensed phase? (please explain why)
choloine atom is more electronegative than carbon so there is a bond dipole alon the Cl-C bond why then is tetrachloromethane
What is the normality of sulfuric acid solution which contains 6.64 g of H2SO4 in 837 mL of solution provided that the reaction involved
It is known that N2O is a linear molecule, but assume it is not known whether the structure is N-N-O or N-O-N. Use the IR data to decide between the two structures. What Vibrations can be assigned to the strong absorbtion bands? What are the possi..
Draw all stereoisomers of 3-heptene. Position the groups attached to the double bond (120° bond angles) to indicate the stereochemistry.
Draw the electron-dot formula for each of the following molecules or ions: a) HCCH (ethyne); b) CS2 (C is the central atom); c) NO^+
When a 23.7 mL sample of a 0.362 M aqueous nitrous acid solution is titrated with a 0.310 M aqueous potassium hydroxide solution, what is the pH after 41.5 mL of potassium hydroxide have been added
A mixture of Ar and N2 gases has a density of 1.439 g/L at STP. What is the mole fraction of each gas. Express your answers using four significant figures. Enter your answers numerically separated by a comma.
Compute the number of rads and rems of radiation in five years from such a level of plutonium.
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