The mass in grams

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Limiting Reactant and Yield %

Limiting Reactant and Yield %. See attached file for full problem description.

Percents of yield

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Formula

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Standard Molar Enthalpy of Formation

Propane burns in oxygen according to the equation: C3H8(g) + 5O2(g) ---> 3CO2(g) + 4H2O When 1.464 g of propane is burned in an excess of oxygen in a calorimeter at 298.15 K and 1 bar, 67.86 kJ of heat are released. Calculate the standard molar enthalpy of formation of gaseous propane.

chemical reactions

We had a lab using Cu(II) Chloride dihydrate, water and Aluminum foil. we put the Cu(II) in water, stired and then crumpled the foil and dropped in solution. We are supposed to describe any additional experiment we would do to prove our hypothesis. (the aluminum pulled the copper solids out of the solution and the aluminum di ...continues

Calculating mass

The mass of a crucible and a hydrated salt was to be 21.477g.The mass of the crucible and the anhydrous salt was 20.070g. The mass of the crucible was 17.985 g. a)calculate the mass of the hydrated heated b)calculate the mass of h2o lost from the hydrate during heating c) calculate the percent water in the hydrate

enthalpy of reaction

write the equation for the combustion of 1 mole of ethanol in oxygen and calculate the enthalpy of reaction for this change given delta Hf(CO2) = -393.7Kj/mol delta Hf(H2O) = -285.9 Kj/mol and delta Hf(C2H5OH)=-227kj/mol. is the reaction exothermic or endothermic

Problem set

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Formula

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