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Why must all the lines in the hydrogen spectrum between 2500 A and 7000 A belong to the Balmer series?
In a gas mixture, the partial pressures are nitrogen 435 , oxygen 145 , and helium 240 . What is the total pressure ( torr) exerted by the gas mixture?
Initially, .500 atm of H2 and .500 atm I 2 are mixed in an evacuated 1.0 L flask. The system is allowed to come to equilibrium and it is found tocontain 0.368 atm HI. What is the equilibrium partial pressure of I2 for the reaction shown below
Benzene is a organic solvent with the formula, The volume occupied by 1 micromole of liquid benzene and the volume occupied by 1 megamole of benzene as a vapor at STP (assume an ideal gas)
What is the temperature change If 84 joules of heat are added to a pure gold coin with a mass of fifteen grams? It is given that the Specific heat capacity of Au= 0.128
a radioisotope used to evaluate heart function in exercise stress tests, decays by capturing one of its own core electrons. it also emmits gamma rays. write an equation for its nuclear decay, then identify the daughter isotope
Consider the reaction 2NO2(g)--> N2O4(g). Go = -5.40 kJ at 298K. (b) Calculate delta G at 298K if partialpressures of NO2 and N2O4 are 0.36 atm and 1.60 atm
A 6.269 g sample of NiCl2·2H2O is heated until all the water of hydration is removed. What will be the mass of the remaining NiCl2?
Which protein elutes first from a carboxymethyl cellulose ion exchange column with an increasing pH gradient
Phenylephrine is a nasal decongestant and is the active ingredient in Sudafed, which contains phenylephrine hydrochloride (PEHCL). The conjugate acid (PEH+)
For a dehydration reaction in metabolism, wherein water is removed from an alcohol to create an alkene: a. Requires NAD+ b. is an example of substrate oxidation c. Requires NADH d. is not a redox reaction and does not need an external e- acc..
Does the carbocation intermediate in the hydrolysis of 2-bromo-3-methylbutane rearrange by way of a hydride shift, methyl shift, or neither
Estimate the temperature where ?G=0 for the following reaction: (giving ?H= -176 kJ, and ?S= -284.5 J/K) CAUTION Beware of units. NH3(g)+HCl(g)--->NH4Cl(s)
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