A dynamic equilibrium will be established any time a reaction is reversed. True or false
Posted 6 years ago by preeiguri in Chemistry 30 | 1 answers
#chemistry 30 #equilibrium
if 20mL of 1.0mol/L is to be used in this experiment and it is the limiting reagent what is the minimum volume of 1.0mol/L H2SO4 is requires to ensure H2SO4 is the excess reagent?
Posted 6 years ago by jk6011 in Chemistry 30 | 0 answers
#chemistry 30 #net enthalpy
calculate the enthalphy of solution of cacl29(aq) if when 11.0g of cacl2 is added to water to make 125ml of solution the tempreture increases from 25.0 to 39.2(-75.0kj/mol)
Posted 6 years ago by tim123 in Chemistry 30 | 1 answers
#chemistry 30
A 70.0g sample of water at 95.00C is mixed with 50.0g of water at 135C. Calculate the final tempreture of the mixture assuming no heat loss to the surroundings. Remember that the heat gained by the cooler water is equal to the heat lost by the warmer water.
Posted 6 years ago by tim123 in Chemistry 30 | 1 answers
#chemistry 30
A student set up an electrolytic cell similar to the one in the Electrolysis experiment to collect hydrogen gas over water in a burette, using a small strip of lead metal as the anode (instead of copper). Before the electrolysis, the mass of the lead strip was 9.333 g. A current of 121.1 mA was applied for a period of 3600 seconds, during which time some of the lead metal was oxidized to lead (2+). What was the mass of the lead metal strip at the end of the electrolysis?
Final mass of lead strip = ? g
(calculate your answer in grams, but do not include the units when submitting your response)
Posted 6 years ago by in Chemistry 30 | 2 answers
#chemistry 30
A student set up an electrolytic cell similar to the one in the Electrolysis experiment to collect hydrogen gas over water in a burette, using a small strip of lead metal as the anode (instead of copper). Before the electrolysis, the mass of the lead strip was 8.218 g. A current of 121.1 mA was applied for a period of 3600 seconds, during which time some of the lead metal was oxidized to lead (2+). What was the mass of the lead metal strip at the end of the electrolysis?
Final mass of lead strip = ? g
(calculate your answer in grams, but do not include the units when submitting your response)
Posted 6 years ago by spongebob in Chemistry 30 | 0 answers
#chemistry 30
Zn(s) + O (g) ZnO(s) + 350.5kJ
calculate the standard enthalpy of reaction when 25.0g of zinc oxide is produced.
Posted 6 years ago by gurleenm in Chemistry 30 | 3 answers
#thermochemistry
Zn(s) + 1/2O2 (g) ZnO(s) + 350.5kJ
calculate the standard enthalpy change of reaction when 25.0g of zinc oxide is produced
Posted 6 years ago by gurleenm in Chemistry 30 | 1 answers
#thermochemistry
Using Hess's Law, the enthalpy of reaction for the following equation:
2C2H4O(l)+2H2O(l)→22C2H4O(l) + 2H2O(l) → 2C2H6O(l) + O2(g)
C2H6O(l) + 3O2(g) → 2CO2(g) + 3H2O(l) ΔH = -685.5 kJ
C2H4O(l) + 5/2O2(g) → 2CO2(g) + 2H2O(l) ΔH = -583.5 kJ
Posted 6 years ago by gurleenm in Chemistry 30 | 1 answers
#thermochemistry
Methanoic acid,HCOOH(aq) , is sometimes known as formic acid (from the Latin formica for ant, since ants secrete formic acid). Suppose that an ant uses 1.0 x 10-5 mL of formic acid with a pH of 2.456 every time it bites. What mass of methanoic acid does it use in each bite?
Posted 6 years ago by eric19 in Chemistry 30 | 1 answers
#chemistry 30