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Part of this unit concentrated on gaseous molecules, but stated that liquids and solids can also consist of molecules. Ethanol and aqueous film-forming foam are examples of liquid molecules. Discuss how the thickness (viscosity) of ethanol or aqueous film forming foams can be changed. Does the foam have a higher or lower molecular weight? Why, or why not? 200 words minimum
The reaction between ethyl iodide and hydroxide ion in ethanol (c2h5oh) solution, c2h5oh + oh --> c2h5oh + I, has an activation energy of 86.8 kj/mol and a frequency factor of 2.1 x 10^ 11
Calculate the amount of heat required to completely sublime 51.0 g of solid dry ice (CO_2) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol .
Explain an iron skillet with a mass of 0.96 kg and a copper skillet of the same mass are both at a temperature of 165.0 degrees Celsius. Explain when the skillets cool to room temperature (22.0 degrees Celsius)
Thirteen grams of titanium react with 60.0 g of bromine. How many grams of titanium(IV) bromide are produced, assuming 100% yield.
A thermometer indicates that water freezes at 0.5 degrees Celsius and boils at 100.2 degrees Celsius at a barometric pressure of 760 torr. The observed freezing point of an unknown liquid is -1.3 degrees Celsius.
calculate the solubility of silver sulfate in water at 25 degree celcius, express answer in molarity; and how would the solubility of silver sulfate change
Concentrated H2SO4 is 96% by weight H2SO4 and has a density of 1.84 gm/mL. Calculate the volume of concentrated H2SO4 acid required to make 150 mL of 4 M H2SO4.
The statements in the following multiple choices deal with the concept of equilibrium. Choose the statement which is true. a) At equilibrium the speed of a reaction equals its rate constant.
an intimate mixture of Fe2O3 and Al is used in solid fuel rocket .calculate the fuel per g and per ml of mixture. del Hal2o3 =399 kcal , del H fe2o3 =199 kcal density of Fe2O3 and AL are 5.2 g /ml and 2.7 g /ml respectively
Suppose that 150.2 J of heat energy is required to completely vaporize 5 g of a pure liquid. If the molar mass of the liquid is 95.64 g/mol, what is the molar enthalpy of vaporization of the liquid
Calculate the theoretical yield of C2H5Cl. Calculate the percent yield of C2H5Cl if the reaction produced 176 g of C2H5Cl.
In an experiment, 1.26 grams of iron combines with oxygen to give a compound that has a mass of 1.80 grams. What is the empirical formula of the compound?
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