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a) 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. (c) From a consideration of the number of nonbonding and antibonding interactions, arrange these molecular orbitals in order of increasing energy?
used in high speed centrifuges to separate the parts of a biological cell. How many liters of 3.07 M sucrose contain 245 g of solute?
0.134 mole of kcl and 0.248 mole of cacl2 were dissolved in water. calculate the total number of moles of cl- ions in the solution.
What is the most important attractive forces (London dispersion, dipole dipole, hydrogen bonding) and the number of bonding domains
If the reaction 4NH3 + 5O2 yeilds 4NO + 6H2O uses 824 g NH3 and excess oxygen, how many moles of NO are formed?
How would you prepare 1.0 ml of a 0.6 mg/ml protein sample from a 1.0 mg/ml protein stock solution in a given phosphate buffer? b) 1 ml of water and 1.0 ml of a solution "x" mixed together is a 1:2 dilution of "x" in water.
The gaseous product of a reaction is collected in a 25.0-L container at 27 degrees C. The pressure in the container is 300.0 kPa and the gas has a mass of 96.0 g. How many moles of the gas are in the container.
Although the double bond, in total, is stronger than a single bond, the pi bond itself is weaker and can react with electron-deficient species such as a hydrogen ion.
Write an equation for the formation of NH3g from its elements in its standard states.
What is the difference between a strong acid and a weak acid. Calculate [H30+] in each aqueous solution at 25 C and classify each solution as acidic or basic one.
Calculate the number of bromine molecules present in the flask if A flask contains 0.350mol of bromine, Br2 in liquid form .
What is the first step in the reaction sequence of Aldol reactions under basic conditions? a. Removal of the aldehyde proton b. Removal of an alpha proton to form the enolate
Draw a flow sheet to show how you would separate the componenets of a mixture containing an acid substance,toluic acid, a basic substance, p-bromo-aniline and anthracene, a nuteral substance.
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