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Question: A 25.00-mL sample of an unknown H3PO4 solution is titrated with a 0.100 M NaOH solution. The equivalence point is reached when 52.58 mL of NaOH solution is added. What is the concentration of the unknown H3PO4 solution? The neutralization reaction is:
H3PO4(aq) + 3 NaOH(aq) 3 H2O(l) + Na3PO4(aq).
Calculate the values of Avogadro's number and the Faraday assuming the charge in an electron is 1.602 x 10^-19 coulombs/electron. Also calculate the mass the magnesium anode have lost during the process
a dissolve 8g of ammonium iron iisulfate in 25cm3 of water that has been acidified with 1cm3 of 2m sylfuric acid.add
When solid mercury (II) is heated, it forms solid mercury (II) oxide and gaseous nitrogen dioxide and oxygen. what is the balanced equation?
If a neurons inter-celluar potassium level (K+) is 410mM and it takes -70mV to maintain resting cell potential, what is the concentration of potassium outside of the neuron
Elemental exonium (not a real element) consists of two major isotopes
Determine the relative abundance in of each isotope in the synthesized material. To make it easy, use whole numbers (intergers) for the atomic mass of the meitnerium isotopes in your calculations.
a metal sample weighing 45.0 grams and at a temperature of 99.1 degrees celsius was placed in 38.6 grams of water in a
What is the the molar composition of the products when a stream of CH4 is combusted with 5% excess air if you have 1600 moles per hour of methane being fed into the reactor
What is the final pH of the solution when 15.0 mL of 0.121 mol/L NaOH(aq) and 35.0 mL of 0.181 mol/L HNO2(aq) are mixed? Assume the temperature is 25oC.
Calculate the amount of heat (in kj) required to heat 2.75 kg of water from 13.20 degrees celsius to 46.32 degrees celsius
The labels of bottles that contain barium hydroxide, hydrochloric acid and sodium carbonate had fallen off. When the contents of the bottle A were mixed with B's Contents, a white precipitate formed, A with C yielded a gas and B with C gave heat.
Determine the volume measured in a buret of a 0.2750M solution of HCl needed to consume all the calcium carbonate in a 2.5 x 1.0 x 0.5 in block.
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