Question

A. one serving serving of Gatorade is 591 ml if a serving contains 34.0g of sugar how many ounces of sugar are in 1.00L of gatorade?

B. Which electron transition in a hydrogen atom would result in the lowest energy photon emmited? 2->3 5->2 4->6 3->6 or 4->2

C. A double shot of expresso contains 0.150g of caffeine in 30.0 mL. An Americano adds 90 mL of water to the double shot. If the molar mass of caffeine is 194.19 g/mol. What is the molarity of caffeine in a single shot of espresso? What is the molarity of caffeine in Americano?

Answer 1

A) The sugar mass is calculated:

m sugar = (34 g sugar / 591 mL) * 1000 mL * (1 oz / 28.35 g) =

B) The atom emits energy when its electron falls into the energy level, and the lowest emission occurs at the highest levels:

4-> 2

C) The molarity is calculated in each case:

M1 = (0.150 g / 30 mL) * (1 mol / 194.19 g) * (1000 mL / 1 L) = 0.026 M

M2 = M1 * V1 / V2 = 0.026 M * 30 mL / 120 mL = 0.0065 M

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