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Write the electron configuration of a neutral atom with 31 electrons. Which element is this? Explain what this electron configuration tells us about the electrons in the element. Be specific in explaining what the letters and numbers mean.
Calculate the work of expansion accompanying the complete combustion of 1.0g of glucose to carbon dioxide and (a) liquid water, (b) water vapour at 20 degrees Celsius when the external pressure is 1 atm
A strip of aluminium of mass 42.7g is dropped into a beaker of dilute hydrochloric acid. Calculate the work done (in J) on the surrounding atmosphere (1atm pressure, 24oC ) by the evolution of hydrogen in the subsequent reaction
A solution is made by mixing 12.0g of NaOH and 70.0mL of 0.200m HNO3. Calculate the concentration of OH- ion remaining in the solution.
In a hypothetical crystal, X rays of wavelength 0.097 nm are reflected at an angle of 17.1 degrees. What is the spacing between planes of atoms in the crystal, assuming n = 1
The work function for Cu metal is 4.80 eV. If a piece of Cu is bombarded by violet light (λ = 4,000 Å), will electrons be ejected? "YES" or "NO" with supporting argument/calculation.
Mass of copper gluconate: 1.4 g Mass of Al cup: 2.3g Mass of Al cup + Cu: 2.4g
calculate w and delta e when one mole of a liquid is vaporized at its boiling point (80 degrees celscius) and 1.00 atm pressure. Delta H vaporization for the liquid is 30.7 kJ/mol at 80 degrees celscius.
Which element formed, according to the theory of the Big bang, before the first generation of galaxies formed
question if a system has 5.00 times 102 kcal of work done to it and releases 5.00 times 102 kj of heat into its
State A chunk of dry ice CO2(s), weighing 4.5g is sealed inside a 2 L soda bottle initially containing 1 bar of air. Explain what is the total pressure in the bottle after the dry ice sublimes as well as comes to 298.15 K
in the second step of the Mond process, the gaseous Ni(CO)4 is isolated and heated to 500 K. the equilibrium constant for the above reaction at 500 K is 1.21 x 10^-4. why is the temperature increased for the second step of the Mond process?
a balloon is filled with hehelium of 500.0ml nbspat 27 0c and 755 mm hg. in the atmosphere whennbsp the balloon rises
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