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A student does a mini-titration with an unknown acid by adding 13 drops of 2M NaOH to 9 drops of the unknown solution. What is the concentration of the unknown acid?
A mixture of the compounds aluminum bromide and magnesium oxide contains 0.381 g of aluminum and is 89.7 % by mass magnesium oxide.
Calculate the initial concentration of the colored reactant if the absorbance is 0.605 at the beginning of the reaction.
When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2Al(s)+6HCl(aq) yeilds 2AlCl3(aq)+3H2(g). what mass of Al(s) if required to produce 725.5 mL of H2(g) at STP
what volume of 0.50 m sodium hydroxide is needed to titrate 150 ml of 0.33 m hydrocyanic acid hcn to the equivalence
Radium-226 (atomic mass = 226.025402 amu) decays to radon-224 (a radioactive gas) with a half-life of 1.6x10^3 years. What volume of radon gas (at 25 C and 1 atm) is produced by 22 grams of radium in 4.5 days.
mass m in a one dimensional box of length L? If the answer is yes, then express the energy of this trial wavefunction in terms of h, m, and L?
Calculate the delta h required to 1 mole of ice at -25 degrees celcius to convert steam at 125 degrees celsius
what fators are generally responsible for the variaion in the base strength of nitrogen
Calcule the platinum electrode potential (vs. NHE), immersed in solution containing 0.50 M Br2 KBrO3 0.20 M at pH = 2.5
Consider the decomposition of calcium carbonate. Assume that ?H° = 177.8 kJ/mol and ?S° = 160.5 J/K·mol for the temperature range. CaCO3(s) -> CaO(s) + CO2(g)
Given that B(SiO) 640 kJ/mol, show that bond enthalpy considerations predict that silicon-oxygen compounds are likely to contain networks
What are the coefficients of the reactants and products in the balanced equation above? Remember to include H2O(l) and H+(aqu) in the appropriate blanks.
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