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Acetylene (C2H2) and a hydroxide can be made by reacting calcium carbide (CaC2) with water. (a) Write a balanced equation for the reaction (b) What is the maximum amount of heat (in joules) that can be obtained from the combustion of acetylene, starting with 61.4g CaC2? delta H formation (CO2) = -393.5 kJ/mol delta H formation (C2H2) = 226.6 kJ/mol delta H formation (H2O) = -285.8 kJ/mol
What conditions are used in the Haber process to enhance the yield of ammonia. Explain why each condition affects the yield in terms of the Le Chatelier principle
what is the voltage after the addition of the following volume of NaI solution? The reduction potential for the saturated calomel electrode is E = 0.241 V. The standard reduction potential for the reaction is E0 = 0.79993 V.
Why is the pka of formaldehyde less than acetaldehyde, a regular aldehyde or a ketone? Why is it a stronger acid compare to these other structures?
Treatment of the solution with ClO- in alkaline solution yields a yellow solution and a colored precipitate. Ions Present- Ions absent
Phenolphthalein is one of the most common indicators. What are its colors in acidic and in basic solutions?
methane flowing at 2 mol/min is adiabatically compressed from 300 K and 1 bar to 10 bar. What is the minimum work required? Use Departure Functions.
The enthalpy change when 1 mol methane (CH4) is burned is -890 kJ. It takes 44.0 kJ to vaporize 1 mol water. What mass of methane must be burned to provide the heat needed to vaporize 1.00 g of water
What volume (in mL) of 0.657 M solution of iron(III) chloride can be made from 52.3 mL of a 1.89 M solution? Assume the volumes are additive.
Suppose that the microwave radiation has a wavelength of 10.8cm . How many photons are required to heat 295mL of coffee from 25.0 ^\circ \rm C to 62.0 ^\circ \rm C
What is the concentration of [Br?] in a solution of 15 mL of 5 M HBr when 5 mL of water is added?
what is the pH of 1.0 L of a buffer that is .11M HNO2 and .150M NaNO2. what is the pH of the buffer after adding 1.0 mL of 12M HCl. pH of original buffer
The half-life of a certain radioactive element is 1,250 years. What percent of the atoms remain after 7,500 years?
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