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A compound is 80.0% carbon and 20.0% hydrogen by mass. Assume a 100.- sample of this compound. How many grams of each element are in this sample?
A 5 once cup of yogurt contains 6.0 g of protein, 2.0 g of fat, 26.9 g of carbohydrate. the fuel values for protein, fat and car. are 17.38 and 17 KJ/g respectively. The fuel values of this cup is how many KJ
Calculate the amount of heat required to heat a 3.5 kg gold bar from 21 degrees celsius to 67 degrees celcius.
Nuclides below the valley of stability can become more stable through which of the following processes
For organic chemistry, what is a concerted shift? how do things like acids or heat affect them? what other factors effect them?
Which solution would increase the osmotic pressure of water the most?
A solution of HCl in water conducts an electric current , but a solution of HCl in hexane does not. explain this behavior in terms of ionization and chemical bonding
In a constant pressure calorimeter 25 mL of 1.0M NaOH reacts with 250 mL of 1.0M HCl and the temperature increases 6.0 degree celsius. What is the enthalpy of this reaction?
The molar solubility of magnesium carbonate is 1.8 ? 10-4 mol/L. What is Ksp for this compound
Calculating Delta H, Use some or all of the following reaction enthalpies to calculate delta H for the reaction:
A mixture of 65 mol% methane, 30 mol% hydrogen, and 5 mol% nitrogen is burned to heat a boiler used to produce hot steam. The ratio of CO2 to CO in the exhaust gas is 10:1.
10 g potassium chlorate is decomposed producing oxygen gas and potassium chloride: 2KClO3 + heat -> 2KCl + 3O2. The actual yield of oxygen measures 3.915576 g. Calculate the theoretical amount of oxygen based on your starting mass of reactant.
Write balanced net ionic equations (using half-reaction method) for each off the following chemical reactions. Show Work. 1) Solid sodium metal is added to a solution of solfuric acid.
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