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A chemist has 80.0 kg of a mixture that is 10.0% potassium nitrate by mass. How much additional potassium nitrate must be added to produce a final mixture that has a potassium nitrate content of 25.0%?
calculate the molar mass of the acid. B. After 10.00 mL of base had been added during the titration, the pH was found to be 5.87. What is the Ka of the unknown acid
the reaction of no with cl2 is2 no cl2 2 nocluse reactant molecules to write appropriate elementary reactions that
A dry cleaning solvent with a molar mass of 146.99 grams/mole that contains C, H, and Cl is suspected to be a cancer causing agent. When a 0.250 gram sample was studied by combustion analysis, 0.451 grams of CO2 and 0.0617 grams of H2O was formed...
The first-order rate constant for the decomposition of a certain hormone in water at 25 degrees C is 3.42*10^-4 day^-1. If a 0.0200 M solution of the hormone is stored at 25 degrees C for 10 months
In non-ionic compounds, the two primary sources of intermolecular forces are permanent dipoles and temporary dipoles. Explain what causes these types of dipoles to form.
Calculate the equilibrium constant kc for a reaction occuring at a temp 0f -19 degree C and when delta G of 1.6 KJ/mol(use R =8.314 J/mol and 273 for kelvin conversion)
The element is so highly unstable that no observations of its properties have been possible. Based on its position in the periodic table, propose two different reasonable valence electron configurations for this element.
compare alkalide ion with the neutral alkali atom.under appropriate conditions alkali metals a can be reduced to yield
when steam condenses to liquid water 2.26kj of heat is released per gram. the heat from 168g of steam is used to heat a
Calculate the pH for an aqueous solution of acetic acid that contains 2.15x10^-3M hydronium ion.
Where did the energy required to maintain the system at a constant temperature in the two isothermal processes described? PAth A- sudden irreversible decrease in pressure from P1 to P2 ( P2
Draw the structures of the bases in DNA and indicate the H bonding interactions between the base pairs.
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