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Identify all of the substances that are used or produced in this experiment A5. Distinguish between elements and compounds.
When a metal was exposed to light at a frequency of 3.94× 1015 s-1, electrons were emitted with a kinetic energy of 5.80× 10-19 J. What is the maximum number of electrons that could be ejected from this metal
How many moles of H+ (H3O+) are produced in 40.0 m of 0.025 M HCL?
Determine the molarity of a solution made by dissolving 20.0 g of NaOH in sufficient water to yield 436 mL of solution.
what mass of solid LiOH must be added to 1.0 L of 1.35 M hydrofluoric acid solution in order to create a buffer solution
The freezing-point depression measurement of benzoic acid in acetone yields a molar mass of 122 g; the same measurement in benzene gives a value of 242 g
how many moles can be produced from 2.5 moles of Ag2CO3 and final temperature of the calorimeter contents is 23.83°C After dissolution of the salt.
Magnesite MgCO3 and siderite FeCO3 are the Mg and Fe end-members of the magnesite-siderite solid solution.
A green leaf has a surface area of 3.00cm^2 . If solar radiation is 1040W/m^2 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504nm for solar radiation.
P4(s) + F2(g)-> PF3(g) What mass of F2 is needed to produce 187 g of PF3 if the reaction has a 80.1% yield?
explain why a less reactive halogen is isolated in the dichloromethane
The calorimeter contains 1.00 kg of water (heat capacity of H2O = 4.184 J/g°C) and the heat capacity of the empty calorimeter is 0.10 kJ/°C. How much heat is released per gram of oil shale when it is burned?
At room temperature (20^circ rm C), milk turns sour in about 63 hours. In a refrigerator at 3^circ rm C, milk can be stored three times as long before it sours. Estimate the activation energy of the reaction that causes the milk to sour.
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