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A 486 mL sample of water was cooled from 50.0°C to 10.0°C. Assuming a specific heat of 4.184 J/K g and a density of 1.00 g/mL, find the amount of heat transferred from the water to the surro
A hypothetical metal has a face-centered cubic unit cell with the edge length of 4.566 Å. Calculate the radius of the metal atom.
A hypothetical metal has a simple cubic unit cell with the edge length of 4.123 Å. Calculate the radius of the metal atom.
If hydroxide ion is formed, the OH- may react with some of the Fe3+ to produce an insoluble hydroxide. Will the percent yield of the iron (III) compound containing a complex ion be affected by the f
A hypothetical metal has a body-centered cubic unit cell and a density of 3.229 g/cm3. The molar mass of the metal is 114.8 g/mol. What is the atomic radius of this metal
An unknown element crystallizes in a body-center cubic crystal structure. The atomic radius of the substance is 2.532 Å and its density is 1.208 g/cm3.
The IR Spectra of solid benoic acid and liquid acetic acid are shown below. The OH stretch of a carboxylic acid is normally a broad peak from 3500-2500 cm-1. Explain why acetic acid has a very broad
The Lyman series of emission lines of the hydrogen atoms are those for which nf = 1. a) determine the region of the electromagnetic spectrum in which the lines of the Lyman series are observed. b) C
A liguid stream in a refinery contains 0.20 mol propane/mol, 0.30 mol butane/mol and 0.50 mole pentane/mol. If the flow rate of the propane is 75 mol/min, what are the flow rates of the butane and p
It takes 10 microliters of solution to produce a spot 1 cm in diameter. If the co(no3)2 solution contains about 6g co2+ per liter, how many micrograms of co2+ ion are there in one spot
Comment on the difference between the impure and crystallized sulfanilamide. What does the difference indicate about your ability to perform an effective crystallization
explain the apparent paradox. although the addition of one equivalent of HX to an alkyne is more exothermic than the addition of HX to an alkene, an alkene reacts faster
What would be the speed of the following particles if they had the same wavelength as a photon of red light ( = 750.0 nm)
The frequency of the middle G note on a piano is 392.00 Hz. What is the wavelength of this note in centimeters? The speed of sound in air is 343.06 m/s. Explain steps.
On a lab exam, you have to find the concentrations of the monoprotic (one proton per molecule) acids HA and HB. You are given 42.5 mL of HA solution in one flask. A second flask contains 45.4 mL of
How long does it take (in minutes) for light to reach Mars from the Sun, a distance of 2.402 × 108 km
A space probe identifies a new element in a sample collected from an asteroid. Successive ionization energies (in attojoules per atom) for the new element are l1 = 0.507, l2 = 1.017, l3 = 4.108, l4
Write a chemical equation representing the second ionization energy for lithium. Use e- as the symbol for an electron.
Consider a hydrogen atom in the ground state. What is the energy of its electron? b. Consider a hydrogen atom in an excited state of
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 4 to n = 1. I need an explanation of the formula too.
X rays have wavelength on the order of 1*10^-10m. calculate the energy of 1.0*10^-10m X-rays in units of kilojoules per mole of X rays.AM radio waves have wavelength on the order of 1*10^4m. calcula
Microwave ovens emit microwave energy with a wavelength of 12.6 cm. What is the energy of exactly one photon of this microwave radiation
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein
one type of electromagnetic radiation has a frequency of 107.1 MHz another type has a wavelength of 2.12*10^-10m,and another type ofelectromagnetic radiation has photons with energy equal to 3.97*1