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Methanol (CH3OH), which is used as a cooking fuel, undergoes combustion to produce carbon dioxide and water; 2CH3OH(l)+3O2(g)-->2CO2(g)+4H2O(l) delta H = -726kJ. How many kilojoules are released when 75.0 g of mehtanol is burned
How much energy is needed to raise the temperature of 16.0g of gold by 17.0degrees C, Answer in units of J
A cube has a volume of 8.0cm (to the 3rd power) and a mass of 21.6 grams. The density of the cube, in grams per cubic centimeter, is best expressed as
A certain sample of the mineral galena weighs 12.4 and has a volume of 1.64 mL. What is the density of galena?
A substance, A2B, has the composition by mass of 60% A and 40% B. What is the composition of AB2 by mass?
How many liters of water vapor can be formed by the reaction of 275.0 liters of oxygen gas and 250.0 grams of pentane? Which reactant is limiting? How many grams of the excess reactant are left over?
Describe how to prepare 50.0mL of 5.30 x10-2 M solution from pure drug and water.
An evacuated (empty) 276 mL glass bulb weighs 129.6375 g. Filled with an unknown gas, the bulb weighs 130.0318 g. Calculate the gas density in g/L.
The molar heat of combustion of methanol (molar mass = 32.0g/mol) is -757kJ/mol. If 2.00 g of methanol is placed in a bomb calorimeter with a heat capacity of 6.50 kJ/degree C what is the temperature rise when the sample is combusted?
How many silver atoms can be produced if 0.00350g of Cu are reacted with excess AgNO3, according to the equation :Cu + 2AgNO3 yields 2Ag + Cu(NO3)2
A sample of sodium reacts completely with 0.355 of chlorine, forming 585 of sodium chloride. What mass of sodium reacted?
An unknown metal hypochlorite salt, M(ClO)2, is subjected to analysis by iodometric titration: the salt is dissolved in dilute sulfuric acid, treated with excess aqueous KI, and then titrated with Na2S2O2 in the same manner as in your experiment
methane and hydrogen sulfide form when 36g H2 reacts with carbon disufide. Calculate the percent yield if the actual yield of CH4 is 69.8
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