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1. A.What is the mass in grams of 2.75 moles of CH4 ?B. How many moles are in 365 grams of K2SO4 ?2. Using the bond energies below determine the value and signof delta H for the reaction:2H-H + O=O → 2H-O-HBond energies in kJ/mol: H-H 432.0 O=O 493 H-O 4603. 2C2H6 + 7O2 → 4CO2 + 6H2OA. How many moles of O2 are needed to react with 5.00 moles of C2H6?B. How many grams of H2O result when 85.0g of C2H6 react?4. When a mole of C9H20 is combusted it reacts with 14 moles of O2A. How many moles of CO2 are produced ?B. How many moles of H2O are produced ?
Consider a lake containing 39 ppb (parts per billion) of parathion, which has a log Kow = 3.8. If a sample of lake water was mixed with octanol, what is the expected concentration of parathion in the octanol?
Determine how much concentrated solution can you take to form 1.15 Litres of 0.105M Nitric acid by mixing with H 2 O?
What is the Ce 3+ concentration in a solution formed by combining 50.0 mL of 0.0500 M Ce 3+ with 50.00 mL of 0.150 M IO3-? The solubility-product constant for Ce(IO 3 )3 = 3.2 x 10 E-10.
Determine the maximum number of electrons that could be emitted from metal by a burst of light with a total energy (E)of 9.86× 10^(-7) Joules?
Determine the Empirical Formula for the following compounds given the following information
Determine the final pH of a solution that is prepared by mixing 25 mL of 0.15 M sodium hydroxide( NaOH )with 20. mL of 0.20 M HA,( a weak acid with Ka = 2.3 x 10-6)?
Write and balance the given chemical equation and Write a balanced equation for this reaction
Calculate how much heat is required to added or removed to convert 100.0 g of steam at 115 0C to liquid water at 65 0C?
Tank full of water (H2O)is open at the top with the hole near the bottom the area of which is 0.25 m^2 and the cross section area of the tank =1 m^2 determine what is volumetric flow rate out of the hole.
determine how many grams of C 12 H 22 O 11 (sucrose) (mm = 342 g/mol) does he need if he uses 375 grams of Water? it is given that the vapor pressure of water =17.5 mm Hg. at 20 degree celsius temperature)
We use Use the De Broglie wavelength formula, ohr radius definition and wave-particle duality equation to compute the wavelength of,
A woman requires taking ibuprofen twice daily in 625mg amount. Each pill in the bottle is 250 mg then determine the number of pills the woman requires to consume each time she needs 625mg dosage
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