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calculate the pH of solution formed by mixing 150 mL of 0.10M HC7H5O2 with 100 mL of 0.30M NaC7H5O2. The Ka for HC7H5O2 is 6.5 E -5
Why does the absolute refractory period occur and What is happening in the cell.
Write a balanced chemical equation for this reaction when Ferrophosphorus reacts with pyrite making iron (ll) sulfide and a compound that is
A sample of oxygen gas () was found to effuse at a rate equal to three times that of an unknown gas. The molecular weight of the unknown gas is __________ g/mol.
A generic salt, AB, has a molar mass of 243 g/mol and a solubility of 8.90 g/L at 25 C what is the Ksp of this salt
A buffer is made using 45.0 mL of 0.750 M HC3H5O2 and 55.0 mL of 0.700 M NaC3H5O2.What volume of 0.10 M NaOH must be added to change the pH of the original buffer solution by 2.5%? Ka for this acid is 1.3 x 10
When a clear aqueous solution of calcium chloride (CaCl2) is mixed with a clear aqueous solution of sodium carbonate (Na2CO3), a white solid precipitate forms.
A solution of phosphoric acid was made by dissolving 10.0g H2PO4 in 10.0 mL of water. The resulting volume was 104 mL. Calculate density, mole fraction, molarity, and molality of the solution.
magnesium sulphate MgSO4 has an observed osmotic pressure =7.6 atm at the temperature of twenty five degree celsius. Determine the observed van't Hoff factor?
What mass of C4H6 in grams is consumed in the reaction below when 36.9 grams O2 (g) are also consumed?
Sodium atoms emit light with a wavelength of 330 nm when an electron moves from a 4 p orbital to a 3 s orbital. What is the energy difference between the orbitals in kilojoules per mole?
If at 25 degrees celcius the partial pressure of oxygen in the iar diffusing through its cathode is 0.22atm, what is the cell potential (Ecell
Calculate how wide is the cloud of organisms at the time peak concentration takes place at the intake pipe.
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