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Hydrazoic acid has a chemical formula of HN3. It is a volatile and toxic acid with a Ka value of 2.5 X 10^-5.
Although it might not be the best choice, a student prepares a buffer using HN3 and NaN3 solutions. Find the approximate pH of the solution s/he made by mixing 0.150L of 0.800M HN3 with 0.200L of 0.25 M N3^- (the sodium ion is omitted for clarity).
Calculate the mass of iodine that will react completely with 40.0 g of aluminum (Al) to form aluminum iodid (AH3)
What is the stoichiometric coeffiecient for oxygen gas when the following reaction is balanced using the smallest whole number coefficients? C12H26(g) + O2(g) --> CO2(g) + H2O(g)
The pH of a sample of rain is found to be 4.0. Calculate the percentage of HSO4- that is ionized in this sample, given that the acid dissociation constant for the second stage of ionization of H2SO4 is 1.2E-2.
Given that the density of solid sodium is 0.968 g/cm^3, estimate the atomic (metallic) radius of a Na atom. Assess the value obtained, indicating why the result is only an estimate and whether the actual radius should be larger or smaller than the..
A closed vessel contains moist air at 20 degree celcius, the relative humidity being 30 %. What would be the relative humidity become if the vessel were cooled to 10 degree celcius?
write a 3 to 4 page apa-formatted paper in which you address the questions below. use at least three cited references
A 2.48 L sample of He at 739 torr is mixed with 6.08 L of Ar at 325 torr both at 25 degrees C is placed in a 4.80 L container at 25 degrees C. What is the partial pressure in atm of He
When the following reaction is balanced in basic solution using the lowest possible whole number coefficients, the coefficient of Cr(OH)3(s) will be: Cr(OH)3(s) + Cl2O7(aq) --> CrO42-(aq) + ClO2-(aq)
Circle the form in which a peptide bond is typically found. Describe how the structure of a peptide bond affects protein structure.
The heat of fusion of acetic acid is 11.5 kJ/mol. Its melting point is 16.6 C. The change in entropy for the melting of acetic acid in J(mol * K) is
What is the molar solubility of Co(OH)2 in a buffered solution that has a pH of 10.43?
Determine the percent by mass of all elements in the compound sodium carbonate decahydrate better known as washing soda.
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