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If I add 0.495 g of solid calcium in a cup and of 100.0mL of deionized water. What is the inital moles of Ca in the cup?
How much energy is released during the complete combustion of 470 grams of cyclobutane
If the atomic radius of a metal that has the body-centered cubic crystal structure is 0.184 nm, calculate the volume of its unit cell ( in nm^3)
question phosphorylation can also serve to activate or inactivate specific enzymes. give an example of one amino acid
you have made up a solution of 100 mm tris ph 7.0. the pka of tris is8.0. compared to the situation at ph 7.0 about how
Determine the molar internal energy (kJ/mol) of HCl (B = 10.59 cm-1 and ? = 2886 cm-1) under standard thermodynamic conditions. For the vibrational part, use N = nNa.
Monothiocarbamate complexes of Fe(III) have been prepared. For the methly and ethyl complexes, the magnetic moment, μ, is 5.7 to 5.8 μB at 300K, changes to 4.70 to 5 μB at 150K, and drops still further to 3.6 to 4 μB at 78K.
The voltage meter reads +0.63 volts. Write out the reaction equation, then calculate the standard reduction potential of Fresnium.
What is the pH of a solution created by dissolving 15.0 g of monosodium phosphate NaH2PO4 and 12.0 g of disodium hydrogen phosphate Na2HPO4. The Ka is 6.2*10^-8. How much .2 M NAOH is needed to raise the pH of the solution by .04 units
isotonic saline solution which has the same osomotic pressure as blood can be prepared by dissolving 0.923 of in enough
At 50 degrees celsius a sample of ammonia gas exerts a pressure of 6.5 atm. What is the pressure when the volume of the gas is reduced to 20% of the original value at the same temperature
0.1278- sample that is 97.50% As2O3 by mass had been used in the titration, how many milliliters of the 0.02140M KMnO4(aq) would have been required?
Platinum crystallizes into a cubic lattice structure that has a total of four Pt atoms per unit cell. (a) What type of unit cell does platinum form. (b) What is the mass of a unit cell of platinum
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