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What is the molecular formula of a compound if the weight is of a unit of the compound is 120 and the empirical formula is C3H4?
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∙ 11y ago
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∙ 11y ago
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What is the Molar mass of empirical formula NO2?
The formula of NO2 has a molecular weight of 46 g/mol. Your compound has a molecular weight of 92 g/mol. As you can see the molecular weight of the compound is twice that of the empirical formula. Therefore the molecular formula of your compound is:2 *(NO2) ---> N2O4
What is the empirical formula of a hydrocarbon containing 85.7 percent carbon and 14.3 percent hydrogen?
The molecular formula is C3H6 and the empirical formula is CH2. This compound is called propene or propylene, and it is a colorless gas.
How can you find the molecular formula of a compound when its percentage composition is given?
Yes, if you have some additional information, such as the molecular weight. For instance, the molecules C2H4 and C4H8 have exactly the same percent composition, but they are very different molecules. So you need some other information to tell them apart than the percent composition.Answer ExpandedThis is kind of a trick question. By knowing the percent composition, you would easily be able to determine its empirical formula, but molecular formula is a bit different. The molecular formula is the actual number of atoms in a molecule, so in order to find the specific molecular formula of a substance, you would also need to know how many grams there is of that substance.(This explains the difference between C2H4 and C4H8)
How do you find the empirical formula of a compound of uranium and fluorine that is composed of 67.6 percent uranium and 32.4 percent fluorine?
This compound is UF6. Atomic weight of uranium: 238,02891 Atomic weight of fluorine: 18,9984032 Molecular mass of UF6: ca. 352,04121
How do you find the molecular and empirical formulas?
There is no easy answer to this question. First, it depends what information you have to start with. Do you have the name? Do you know what elements are found in the substance?If you are given the name of the molecule, you can often find the molecular structure of that compound by simply using the Google search engine online and searching for the name. It is often give you the answer! There are certain compounds that you should be familiar with also. Also, there is a set of official rules that determine the name of a specific compound, so that if you have the formula, you can name it correctly, and if you have the name, you can determine the formula. Unfortunately, many chemicals also have common names that do not follow these rules, and you just have to memorize those, or look them up with Google.See the Related Questions and Web Links to the left for some information about how compounds are named and how to go from a formula to a name and vice versa.
How to calculate empirial formula from molecular formula?
Calculate the empirical formula weight. Find the ratio of the molecular weight to the empirical formula weight. (n= molecular weight/ empirical formular weight). Multiply each subscript of the empirical formula by n.
Empirical and molecular formulas?
The Empirical formula of Al2Br6 is AlBr3.
What is the importance of percentage composition?
Percent composition can be used to calculate the percentage of an element/compound in a mixture. From the percent composition, you can also find the empirical formula. And from the empirical formula you can find the actual molecular weight.
Can you determine the molecular formula of a substance from its percent composition?
Not completely. The empirical formula of a substance can be determined from its percent composition, but a determination of molecular weight is needed to decide which multiple of the empirical formula represents the molecular formula.
What is the Molar mass of empirical formula NO2?
The formula of NO2 has a molecular weight of 46 g/mol. Your compound has a molecular weight of 92 g/mol. As you can see the molecular weight of the compound is twice that of the empirical formula. Therefore the molecular formula of your compound is:2 *(NO2) ---> N2O4
What is the empirical formula of a hydrocarbon containing 85.7 percent carbon and 14.3 percent hydrogen?
The molecular formula is C3H6 and the empirical formula is CH2. This compound is called propene or propylene, and it is a colorless gas.
How can you find the molecular formula of a compound when its percentage composition is given?
Yes, if you have some additional information, such as the molecular weight. For instance, the molecules C2H4 and C4H8 have exactly the same percent composition, but they are very different molecules. So you need some other information to tell them apart than the percent composition.Answer ExpandedThis is kind of a trick question. By knowing the percent composition, you would easily be able to determine its empirical formula, but molecular formula is a bit different. The molecular formula is the actual number of atoms in a molecule, so in order to find the specific molecular formula of a substance, you would also need to know how many grams there is of that substance.(This explains the difference between C2H4 and C4H8)
What is the empirical formula of a compound that is 40percent sulfur and 60percent oxygen by weight?
SO3
How do you find the empirical formula of a compound of uranium and fluorine that is composed of 67.6 percent uranium and 32.4 percent fluorine?
This compound is UF6. Atomic weight of uranium: 238,02891 Atomic weight of fluorine: 18,9984032 Molecular mass of UF6: ca. 352,04121
What is Formula of urea?
The Chemical formula of Urea is CO(NH2)2 its empirical formula is just the same as its chemical formula. Urea has a molecular weight of 60.06gm.
What is the molecular mass of 1 mole of a compound whose formula is c3h7o2?
The same as the molecular weight of the compound.
What is determined by an empirical formula?
Yes, but you also have to pay attention to how many molecules of each element are in the compound. For instance: H2O (water) The weight of H is roughly 1 and the weight of O is roughly 16, but formula weight of water is NOT equivalent to just 1 + 16 = 17 You have to be sure that you account for the total amount of molecules so since there are 2 H present you have to multiply the weight of H by 2; 1 x 2 = 2 Now you have the weight of all the H present and just add that to the weight of the single O molecule 2 + 16 = 18; thus the formula weight of water is 18.
