# I d p e i 33 a compound consists of 722 magnesium and

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d)Pe)I33.A compound consists of 72.2% magnesium and 27.8% nitrogen by mass. What is the empiricalformula?2324
34.What is the formal charge on oxygen in the following structure?0
35.Which is NOT a correct Lewis structure?36.What is the empirical formula of this unit cell if the red atoms are Re and the green atoms areO?4O33
37.Sulfur has four stable isotopes:32S (mass=31.97207 amu, percent abundance=0.02%),33(mass=32.97146 amu, percent abundance=0.75%),34S (mass=33.96787 amu), and36(mass=35.96708 amu). What are the natural percent abundances of34S and36SSS?
38.If the velocity of an electron ejected from a platinum metal sheet (ϕ=612 kJ/mol) is 4.57 x10m/s, what was the wavelength (in nanometers) of the photon that struck the metal surface?39.Your grandma is decorating her Christmas tree. The blue lightbulbs on the string of lights emitlight with a wavelength of 430 nm. If a bulb is on for 20 minutes and emits 6.09 x 1022photons,what was the wattage of the bulb?40.You spill 75.0 mL of 2.5M sulfuric acid on your lab bench. The jar of sodium bicarbonate onlyhas 14.3g of sodium bicarbonate left in it. Is there enough sodium bicarbonate in the jar toneutralize the spilled sulfuric acid?41.35.0 mL of 0.2 M calcium nitrate reacts with 600 mL of 0.075 M sodium sulfate. How manygrams of precipitate are formed?5

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Term
Winter
Professor
Larson,W
Tags
Atom, Sulfur, Chemical bond