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anonymous
 4 years ago
4. Carotene, the pigment responsible for the color of carrots, has a percent composition of 89.49%C and 10.51%H. Its molecular mass was found to be 546.9g. Calculate its empirical formula and its molecular formula.
anonymous
 4 years ago
4. Carotene, the pigment responsible for the color of carrots, has a percent composition of 89.49%C and 10.51%H. Its molecular mass was found to be 546.9g. Calculate its empirical formula and its molecular formula.

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abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0Assuming 100% composition you would take 0.8949g of carbon and 0.1051 g of hydrogen. You then take the molecular mass given to find moles.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok so Carbon has .0745 mol and hydrogen has .1043 mol. now what do i do?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so would the units be g/mol?

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0Divide the mol given by 0.745 for both.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so not by the molecular mass?

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0No. That's for molecular formula. Sorry.

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0like information to osrt of "check"

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0okay so i got 1 for carbon and 1.4 for hydrogen

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0ok, round to the closest whole number ratio and that's your empirical formula

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0okay so what about the molecular formula? and so the empirical formula would be just 1 and 1?

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0Find the total mass of your empirical formula and divide that total by your molecular mass found out.

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0You should have: \[\frac{ 546.9g }{ 13.018g }\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0how did you get 13.018?

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0Well, your empirial formula give is CH. The total mass of C + H = 13.018 g/ mol

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0okay so the answer to 546.9g/13.018g is 42.01.

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0Yep, now multiply that number by your empirical formula to get your molecular formula.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so multiply 42.01 with 1 or 2?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0what is the empirical formula though? 1 or 2?

abb0t
 4 years ago
Best ResponseYou've already chosen the best response.0Use whole numbers. So 42.
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