Maleic acid is an organic compound composed of 41.39 % C,...

Maleic acid is an organic compound composed of $41.39 \%$ C, $3.47 \%$ H, and the rest oxygen. If 0.129 mole of maleic acid has a mass of $15.0 \mathrm{g},$ what are the empirical and molecular formulas of maleic acid?

Key Concepts

Molar Mass Calculation

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole. This concept is used to convert between the mass of a sample and the number of moles, and it plays a key role in bridging the empirical formula with the molecular formula.

Molecular Formula Determination

The molecular formula shows the actual number of atoms of each element in a molecule. It is derived by comparing the molecular mass (or experimentally determined molar mass) with the mass of the empirical formula, allowing for the determination of a multiplication factor to scale up to the true molecular composition.

Empirical Formula Determination

The empirical formula represents the simplest whole number ratio of atoms in a compound. It is calculated by converting percentage compositions to moles and simplifying the ratios, which is fundamental in understanding the basic composition of a substance.

Percent Composition

This concept involves understanding the percentage by mass of each element in a compound. It is critical for determining the amount of each element present and is often the starting point in deriving empirical formulas from experimental data.

Transcript

00:01 We are given the composition, mass composition of meta -acid.

00:04 So we have 41 .39 % carbon and 3 .472 to the semi -hydrogen and the rest of oxygen.

00:10 And also we're given if we have 2 .19 more of that meta -acet, we have 15 gram.

00:15 So what would be the empirical formula and also molecular formula? all right, so the first thing we can find will be the mass potential stage of oxygen.

00:24 Because we only have three elements, so we're going to subtract, take the 100%, to subtract the percentage of carbon and also that of hydrogen.

00:35 And then we should be able to find that the percentage of also just 35 .14.

00:42 Okay, so that's the first one we can do.

00:44 Second, we can actually find out the motor mass from our information over here.

00:50 Okay, so if we remember, number of molecules to mass divided by the molar mass.

00:57 So, number of moles is equal to mass, divided by molar mass, and we want to find the molar mass.

01:04 So we're going to take a number of mole divide by, sorry, the mass divided by the number of mole, and then we'll have the molar mass.

01:10 All right, so we are going to take 15, the mass divided by the lumber of mole, and then we should be able to find that the molar mass if we're around 1 .16 .3 gram per mole.

01:24 So this is the motor mass of metal acid.

01:28 Okay, so from here we can use our motor mass assume we have one mole to find the corresponding mass of carbon, hydrogen, and oxygen.

01:36 Okay, so we are going to assume have one mole of compound...

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