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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When X rays of wavelength 0.124 nm are diffracted by a metallic crystal, the angle of first order diffraction (n=1) is measured to be 21.3o.
The tank is heated to a pressure of 10 bar. Assuming that Xe behaves like an ideal gas with a specific heat ration of 1.7, calculate the final temperature of Xe in degree C.
If we had not drawn te temperature graph to help determineout "real" highest temperature, would out specific heat have been higher or lower? Explain in few words.
Many cigarette lighters contain liquid butane,C4H10(l). Using standard enthalpies of formation, calculate the quantity of heat produced when 5.00g of butane is completely combusted in air under standard conditions.
What sort of interaction occurs between adjacent alcohol molecules? And what sort of interaction occurs between adjacent ketone molecules? Which is stronger?
What is the reaction when elemental Magnesium and elemental copper are placed in an aqueous solution of copper sulfate? Why does the water turn green, and why does green stuff attach to the Magnesium?
Argon, copper, sodium chloride, and carbon dioxide all crystallize in the face centered cubic (fcc) structure. How can this be when their physical properties are so different?
Calculate the molecular mass of PABA, a common sunscreen agent. When 8.32g of PABA is dissolved in 150.0g of chloroform, it boils at 62.62 C. The boiling point of pure chloroform is 61.2 C; the boiling point elevation constant of chloroform is 3.6
A mixture containing only BaO and CaO weighs 2.00g. The oxides are converted to the corresponding mixed sulfates, which weigh 4.00g. Calculate the weight percent Ba and Ca in the original mixture.
When rinsing the walls of the E. flask during titrations with deionized water, why does it have no effect on the reported results of the titration performed?
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