HW problem F9

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Simon Dionson 4I
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HW problem F9

Postby Simon Dionson 4I » Wed Oct 02, 2019 3:49 pm

After finding the molar ratio, would it be inaccurate to express the atom ratio in the same whole numbers as the molar ratio? My thought process would be as if the atoms cancel out if put in a ratio and only the whole numbers from the molar ratio would remain.

Gerald Bernal1I
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Re: HW problem F9

Postby Gerald Bernal1I » Wed Oct 02, 2019 3:52 pm

What do you mean atom ratio?

Simon Dionson 4I
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Re: HW problem F9

Postby Simon Dionson 4I » Wed Oct 02, 2019 3:56 pm

gbernal1C wrote:What do you mean atom ratio?

The problem asks me to express "In what atom ratios are the atoms present in vanillin?". I believe that refers to how much atoms of C, H, and O are there in a ratio.

Suraj Doshi 2G
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Re: HW problem F9

Postby Suraj Doshi 2G » Wed Oct 02, 2019 4:01 pm

I would think that the molar ratio and the atom ratio are the same, so I do not think that it would be inaccurate. But when creating the molecular or empirical formula, you must have whole numbers denoting the number of atoms in a specific molecule.

AVerma_F19
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Re: HW problem F9

Postby AVerma_F19 » Wed Oct 02, 2019 4:20 pm

I believe these would be the lowest whole number ratios that you get--essentially the empirical formula.

Sally Qiu 2E
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Re: HW problem F9

Postby Sally Qiu 2E » Wed Oct 02, 2019 4:24 pm

I'm not sure what you quite mean by the atoms "canceling out", but I would assume atom ratio refers to the subscript on the elements in the formula. More specifically the empirical formula.

Sydney Myers 4I
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Re: HW problem F9

Postby Sydney Myers 4I » Wed Oct 02, 2019 4:46 pm

If by molar ratio you're talking about the whole numbers that you get once you've manipulated the number of moles of each substance into a ratio (dividing by the smallest amount then multiplying all of those ratios by a scalar until they're all whole numbers), then yes, they are the same as the atom ratio (which is the empirical formula).

AArmellini_1I
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Re: HW problem F9

Postby AArmellini_1I » Wed Oct 02, 2019 4:52 pm

I don't think you have or necessarily should express it as such, but if you were looking at atomic ratios (as in number of atoms per reactant or product or compound) that would be represented as subscripts.

Sjeffrey_1C
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Re: HW problem F9

Postby Sjeffrey_1C » Wed Oct 02, 2019 6:04 pm

I answered with both the ratio I got by converting the percents to grams, then dividing by the g/mol to get the moles of each, then dividing each value by the lowest mole value (1.972), as well as a ratio in full numbers (empirical formula).


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