# Chemistry

If one serving of chips is 160 kcal/s, how many potatoe chips would you have to eat to equal 262kJ/mol? (272kJ/mol=energy difference)

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1. I'm sorry, one serving of chips is equal to 160kcal

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2. 262 kJ/mol? per mol of what? And 272 kJ/mol = energy difference of what? And how many otato chips = 1 serving?

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3. Well this was the original problem: The first excited state of Mg is reached by absorption of 457.1 nm light. Calculate the energy difference (kJ/mol) between the ground and excited states.

The energy difference (E) came out to be 262kJ/mol. So now, I need to find out how many potatoe chips would a person have to eat to obtain an energy difference of 262kJ/mol. 21 chips=1 serving

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4. why do sodium chloride and sodium nitrate all impart the same color to the flame?

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5. I assume the 272 is a typo. And you want to know how many potato chips = 262 kJ.
First, convert 160 kcal to Joules.
4.184 J/cal so
(160 kcal/serving) x (1000 cal/kcal) x (4.184 J/cal) x (1 kJ/1000 J) = ?? kJ/serving.

Then 262 kJ x (1 serving/?? kJ) = # servings.

Then # servings x (21 chips/serving) = # potato chips.

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6. Jessica--If you have a question to ask, please go to the top of the page and click on Post a New Question. Then type your question and post. Chances are slim of getting an answer from a question that is piggy backed onto another question.

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7. Thank you DRBob222! Is there an equation that you used?(so I can know for future reference)

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8. No, I just used the unit factor method (dimensional analysis).

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