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1) A redox reaction occurs at 2 atm and 25 degrees Celsius between Al and HCl. What is the volume of the hydrogen gas which is generated, if 10g of Al is combined with 10g of HCl?
2) When the reaction is carried out in the lab under the given conditions of temperature and pressure, only 1.6L of hydrogen gas are generated. What is the percent yield?
Does nitro compounds cause any harmful effect on living things?
Explain why the electron affinity of nitrogen is approximately zero, while the elements on either side, carbon and oxygen, have substantial positive electron affinities.
A bottle of wine contains 12.5% ethanol by volume. The density of ethanol is 0.789 g/cm3. Calculate concentration of ethanol in wine in terms of mass percent and molality.
Addition of bromine to 130 mg of trans-stilbene gave 200 mg of meso-dibromide. Calculate the percentage yield.
Calculate the energy in kJ/mol needed to remove the electron from n=1 in a mole of hydrogen atoms. what is this energy called?
A flask contains 400 ml of .5 M phosphate buffer that has a ph of 7.5 What volume of .1 M HCl should be added to drop the ph to 7.1
The pKa of one of the hydrogens that is attached to one of the nitrogens of the purine guanine is 9.7. If guanine is in a solution that has a pH of 10.2, then what is the net charge of the molecule at this pH. Enter your answer as a decimal to two..
For which elements (main group or transition) do the numbers of electrons in the outer or valence, shell correspond to the group number
how many milliliters of 0.100 mol of koh solution are needed to completely neutralize the hcl in 300 ml of a
What is the pH of a 0.16 M solution of oxalic acid, H2C2O4. The Ka1,2 values of oxalic acid are 5.6 x 10-2 and 5.4 x 10-5. For a weak polyprotic acid, it is usually OK to assume the hydronium ion concentration, and hence the pH, results predominan..
the average rate of consumption of br- is 1.85times10-4 over the first two minutes. what is the average rate of
Discuss how are elements, compounds, neutrons, protons, atomic number, mass number and isotopes are related under structure and bonding (Information should include the interrelationship between the structure and bonding in elements all in detail)
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