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Question- Radioactive uranium-238 decays with a half-life of 3.2 billion years. What is rate constant of this decay in year-1?
As much detail as probable is really appreciated
An unknown material begins to emit electrons from it's surface when exposed to photons with wavelengths shorter than 540 nm. Give the threshold frequency and the work function for this material.
When you measure a volume of a liquid using a graduated cylinder, read the top position of the meniscus of a liquid to determine the volume 2.Extra chemicals you sampled should be returned into the original container
Calculate the wavelength in meters of light absorbed by an electron in an atom of hydrogen as it moves from n = 3 to n = 6.
The ionic radius of Cs+ = 0.174nm, radius Cl-= 0.181nm, and the coordination number of each ion = 8. Calculate the lattice parameter, 'a', of CsCl, (CsCl is cubic).
1) What is the shape around the nitrogen atom in NH3. Draw the shape of the molecule. 2)? Draw the electron symbol for MG+2. 3) Draw the electron symbol for C
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Trace amounts of rare elements are found within groundwater and are of interest to geochemists. Europium and terbium are lanthanide-series elements that can be measured from the intensity of their fluorescence emitted when a solution is illuminate..
What is the maximum number of water molecules that could form H bonds (one H bond per water molecule) with 1-propanol. to glyceraldehyde
what is the molecular formula of a compound that contains 28.2% of potassium ,25.6% of chlorine and 46.2% of oxygen ? the molar mass is 138.5u.
Utilize the thermodynamic data in Appendix B to compute the standard cell potential as well as the equilibrium constant at 25°C for the cell reaction in a direct methanol fuel cell
NO(2) + CO--> NO +CO(2) is 125 Kj/mol and delta E for reaction is -216 kJ/mol. What is the activation energy for the reverse reaction. (NO+CO(2)--> NO(2) +CO
What is the volume of NH3 produced in the following reaction when 3.0 L of N2 reacts with 4.0 L of H2? N2 (g) + 3H2 (g) -> 2NH3(g)
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