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Boron has two naturally occurring isotopes, 10B (19.9%) and 11B (80.1%). Although the B2 molecule does not exist naturally on Earth, it has been produced in the laboratory and been observed in stars. How many different B2 molecules are possible? What are the masses and percent abundances of each?
Which of the following is true about the photoelectric effect. a) The number of electrons emitted increases with intensity of light, regardless of the frequency. b) The number of electrons emitted increases with the intensity of light
in other words, why isn't the tetra-alkylated ortri-alkylated product formed? What are the two other isomers (structure and name) that are possible of forming?
State the conditions under which all derivatives of benzene like chlorobenzene, benzoyl chloride and chlorophenyl methane would react with sodium hydroxide.
Find the number of moles of water that can be formed if you have 150mol of hydrogen gas and 70mol
Consider a gas in a 1.0 L bulb at stp that is connected via a valve to another bulb that is initially evacuated. Answer the following concerning what occurs when the valve between the two bulbs is opened.
What is the HCl concentration if 69.7 mL of 0.350 M NaOH is required to titrate a 30.0 mL sample of the acid?
Determine the moles of benzene that would be needed to completely react with 0.445 moles of oxygen
Write the cell notation for a voltaic cell with the following half-reactions.
Show the orbital-filling diagram for rm N (nitrogen). Stack the subshells in order of energy, with the lowest-energy subshell at the bottom and the highest-energy subshell at the top.
A metal sample weighing 124.10 g and at a temperature of 99.3 C was placed in 42.87 g of water in a calorimeter at 23.9 C. At equilibrium the temperature of the water and metal was 41.6 C.
the rate constant for the second order reaction is 0.80 m-1s-1 at 10 degree celsius temperature for the given reaction
What is the equilibrium expression for the following reaction. Please interpret as an equilibrium symbol.
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