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acetylene (C2H2) torches are used in welding. How much heat in kJ evolves when 5.0g of C2H2 (d=1.0967kg/m^3) is mixed with a stoichiometric amount of oxygen gas? The combustion reaction is
C2H2(g) + 5/2 O2 (g) --> CO2 (g) + H2O(l) (heat of reaction is . -1299.5kJ
A balloon was filled to a volume of 2.50 L when the temperature was rm 30.0 C. What would the volume become if the temperature dropped to rm 11.0 0C.
How can I make up 100ml of a solution containing Compound A (solid, purity of 83.7%) at 90 ug/ml and compound B (liquid, density 1.12 and purity of 90.5) at 30 ug/mL for HPLC reference standard.
insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 475 of insulin at a concentration of 30.0 . What is the total mass of insulin in the bottle?
if 8.40 grams of C are burned, how much heat will be released for the following balanced reaction: C + O2 -> CO2 + heat (393 KJ)
Important information about Net ionic equation, What is the net ionic equation of 2Fe(NH4)2(SO4)2*6H2O + 6K2C2O4 + H2O2 + H2SO4
What is the minimum number of liters of air that must pass over a sample of the compound at 25oC to vaporize 1.0 mg of it? Hint: You know the Vapor Pressure from question "a" above and you are given the temperature and mass.
which is limiting reagent when 42.0g of propane , C3H8, is burned with 115g of oxygen ? how many liters gaseous water are produced at STP
2C8H18(g) + 25O2(g) --> 16CO2(g) + 18H2O(g) 0.400 mol of octane is allowed to react with 0.600 mol of oxygen. Which is the limiting reactant?
Calculate the de Broglie wavelength for each of the following.
A volume of 80.0 ml of H2O is initially at room temperature (22.0 C). A chilled steel rod at 2.00 C is placed in the water. If the final temperature of the system is 21.1 C , what is the mass of the steel bar?
determine the pressure exerted by 1.80 mol of gas in a 2.92-L container at 32.0 degrees celsius.
Write an equation for the formation of an acetal from reaction of excess methanol with benzaldehyde in the presence of an acid catalyst.
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