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Used in welding metals, the reaction of acetylene with oxygen has deltaH = -1255.5 kJ
C2H2 (g) + 5/2 O2 (g) --> H2O (g) + 2CO2 (g) deltaH = -1255.5 kJ
How much PV work is done (in kilojoules) and what is the value of deltaE (in kilojoules) for the reaction of 6.50g of acetylene at atmospheric pressure if the volume change is -2.80 L?
What mass of the hydrate could be recovered from the solution? When separated from a H 2 O solution, copper sulphate forms a hydrate with 5
the actual yield of a reactant is 22 g and the theoreticaal yield is 25 g calculate the percentage yield
At a certain temperature the equilbrium constant is 396 K for H2(g) + I2(g) ↔ 2HI(g) , Calculate the the equilbrium constant for 0.5H2(g) + 0.5I2(g) ↔ HI(g)
Ethanol v dimethylether, What are the molecular weights of ether and dimethylether? Are they isomers of each other or is each an isomer of something else?
50.0 mL of 2.00 M H2SO4 react with 75.0 mL of 2.00M NaOH. Identify the limiting and excess reactants. How many grams of Na2SO4 will be formed.
How much heat is evolved when 27.0 g of glucose is burned according to this equation? C6H12O6 + 6O2 → 6CO2 + 6H2O; Δ H comb. = -2808kJ
Calculate the pH of the final solution after 250 mL of a 0.157 mol dm-3 solution of HCl is added to 500 mL of a 0.103 mol dm-3 solution of NaCN (Ka HCN = 6.2 × 10-10).
the solubility of oxygen in water at 25 degree celsius and 1.00 atm pressure is 0.041g/L. what is the solubility of oxygen in water at 6 atm pressure?
Calculate the molar mass of a gas if 4.40 g occupies 3.50 L at 560 torr and 41°C.
How many formula units make up 26.2 g of magnesium chloride (MgCl_2)?
Suppose you have a sample of sodium weighing 11.50 g. How many atoms of sodium are present in the sample? What madd of potassium would you need to have the same number of potassium atoms as there are sodium atoms in the sample of sodium.
How many grams of KHP are needed to exactly neutralize 27.4 mL of a 0.235 M potassium hydroxide solution ?
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