How many kilojoules of heat are absorbed
Calcium carbide (CaC2) can be made by heating calcium oxide (lime) with carbon (charcoal).? CaO(s) + 3 C(s) + heat As†' CaC2(s) + CO(g) Î"H = +464.8 kJ
How many kilojoules of heat are absorbed in a reaction in which 65.6 g C(s) are consumed?
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The concentration of iodine in sea water is 60. parts per billion by mass. If one assumes that the iodine exists in the form of iodide anions, what is the molarity of iodide in sea water?
Using the concepts of chemical kinetics, explain why food kept in the refrigerator or freezer does not spoil as quickly as food kept at room temperature. Address the effect of temperature on the microorganisms, but base your comments on chemical k
What is the ground state electron configuration of Mercury, Hg? Is Mercury expected to be paramagnetic or diamagnetic? Explain Why.
What makes this an oxidation-reduction reaction? Write the half-reactions showing the oxidation and reduction reactions. Identify which is the oxidation reaction and which is the reduction reaction.
Calculate the pressure that must be applied to achieve reverse osmosis of 0.504 M NaCl separated by a semipermeable membrane from a solution that is 0.0020 M in NaCl at 22 deg Celsius.
Assume that you have 1,2,5,and 10 ml pipets and a 25mlvolumetric flask. Describe in detail how you would prepare asolution with a concentration near 0.10 M from a 0.650 M stocksolution.
A 10.0-L balloon contains helium gas pressure of655mmHg. What is the new pressure of helium gas at each of the following volumes if there is no change in temperature?
Why is crossed aldol condensation between acetone and 1-propanalless synthetically useful than the crossed aldol condensationbetween actone and 2,2-dimethylproponal?
If 8.000 grams of copper atoms is weighed out on balancewith an error of +/- 0.002g , how many atoms of copper couldyou be "off" by. Show your work in dimensional analysis.
Convert the composition of the following alloy from atom percent to weight percent (a) 44.9 at% of silver, (b) 46.3 at% of gold, and (c) 8.8 at% of Cu.
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