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Please explain how to determine the packing efficiency of a simple cubic unit cell that contains one atom with a metallic radius of 175 pm.
What will the following peptides look like structurally at pH 1, pH 7, pH 12. (You will draw 3 structures for each.)
Explain what is the heat of the fusion of ice. If cup is 3.494g as well as ice is 11.732g and water 32.128g. Initial water is 23.2 degree Celsius, ice initial is 20 degree Celsius and final temp is 0 degree Celsius. And moles of ice 0.65.
The molar heat capacity of silver is 25.35 . How much energy would it take to raise the temperature of 8.80 of silver by 10.2
iodine trichloride icl3 will react with a chloride ion to form icl4 negative. identify the lewis acid and lewis base.
In order to buffer a solution at a pH of 4.57, how many grams of sodium acetate, NaCH3COO should you add to 500 mL of a 0.150 M solution of acetic acid (CH3COOH)
How much heat is lost when 12.55 g of zinc vapor at 907 degrees celsius is cooled to 425 degrees celsius
20ml of 0.15M H3PO4 is required to neutralize 40ml of a KOH solution. The molarity of the KOH solution is?
if the molarity of the HCl solution was actually greater then the lable indicated would it affect the calculated value for the number of moles of HCl that reacted.
Life in a tropical rainforest is vertically stratified. What abiotic factor probably changes most dramatically across strata?
A gas expands and does P-V work on the surroundings equal to 325 J. At the same time, it absorbs 161 J of heat from the surroundings. Calculate the change in energy of the gas.
Which of the following pairs of aqueous solutions will react when mixed?
The number of nuclei decaying in a sample of Gallium-68 decreased by a factor of 4 over a period of 136.6 minutes. What is the half life of this isotope
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