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65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. How many mL of the base are required to reach the equivalence point? (Ka for HF is 6.8 x 10-4)
How many independent linear combinations are possible for four 1s orbitals? (b) Draw pictures of the linear combinations of H1s orbitals for a hypothetical linear H4 molecule
Cl2 is one of the seven diatomic elements H2SO4 is sulfuric acid and has the sulfate ion with neg 2 charge CH4 is a methane molecule is organic and covalent GeCl4 Germanium tetrachloride which is ionic
determine the numbers of moles of iron that would be formed from 6.2 moles of co carbon monoxide combining with excess
How many grams of sodium formate, NaCO2H are needed to prepare 100 ml of a formic acid, sodium formate buffer
For the reaction aA ? Products, use the following choices? a) zero order in A b) first order in A c) second order in A d) a, b, c e) none of the above so what is (1) [A] is constant and (2) the rate is constant over time
Calculate the concentration of an aqueous solution of Ca(OH2)that has a pH of 12.57? Express your answer using two significant figures.
How much antifreeze would you add to a 2.0 gal water tank in order to obtain a solution that freezes
For chemical reactions involving ideal gases, the equilibrium constant K can be expressed either in terms of the concentrations of the gases (in M) or as a function of the partial pressures of the gases
The specific heat of liquid water is 4.184 J/g. degree C. Calculate the energy required to heat 10.0 g of water from 26.5 degree C to 83.7 degree C.
A mass of 2.50 g of hydrated copper(II) sulfate is placed in a crucible and heated. On heating, 1.59 g of white anhydrous copper(II) sulfate is left behind. Determine the ratio of water to copper(II) sulfate.
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 1.41 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution..
For the next three problems, consider 1.0 L of a solution which is 0.3 M HC2H3O2 and 0.2 M NaC2H3O2 (Ka for HC2H3O2 = 1.8 x 10-5). Assume 2 significant figures in all of the given concentrations so that you should calculate all of the following pH..
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