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Ionization energy involves completely removing an electron from an atom. What wavelength of light is required to remove an electron from the n=5 excited state of a hydrogen atom?
You titrated 1.740g of a solid unknown acid that wasdissolved in 100.0 mL of distilled water; the initial pH value was 2.5. You found that pH= pKa =4.2 when 12.50 mL of NaOH had been added. The concentration of the sodium hydroxide was 0.500M. Cal..
when 500 L of a 2.0 M solution of Pb(NO3)2 is mixed with an excess of 1.00 M solution of KI, how many grams of lead(II) iodine are formed?
90.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.5.
Indicators can be used to estimate the pH value of soultions. To determine the pH of a 0.01M weak acid (HX), a few drops of three different indicators are added to separate portions of HX. The resulting colors of the HX solution are below.
You mix 55 mL of 1.00M silver nitrate with 25 mL of 0.81 M sodium chloride. What mass of silver chloride should you form?
What volume of 0.128 M Li2S solution is required to completely react with 170. mL of 0.128 M Co(NO3)2?
If 1.50 g of X reacts with 3.54 g of M to produce 4.22 g of a compound with the formula M4X3, and the atomic mass of M is 48.5 amu.
if the thermometer is position too high in the distillation adapter how would this affect your boiling point
The concentration of silicon in an iron-silicon alloy is 0.45 wt%. What is the concentration in kilograms of silicon per cubic meter of alloy
This question has two parts: Given that Ka for HF is 6.3 x 10^-4 at 25 degrees C, what is the value of KB for F- at 25 degrees C? and Given that Kb for CH3CH2NH2 is 6.3 x 10^-4 at 25 degrees C, what is the value of Ka for CH3CH2NH3+ at 25 degrees ..
How many molecules of ATP are produced by oxidative phosphorylation for each molecule of NADH produced in the citric acid cycle
A liquid has an equilibrium pressure of 130 torr at 25C and is placed into a 1L vessel. What is the pressure difference shown on the manometer, and what is the composition of the gas in the vessel, under each of the following conditions
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