The cookies is used to store the user consent for the cookies in the category "Necessary". This cookie is set by GDPR Cookie Consent plugin. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. The same result can be easily obtained in a fraction of a second using our calculator. Molar mass of oxytocin = 43*12.0107 + 66*1.0079 + 12*14.0067 + 12*15.9994 + 2*32.065 = 1007.1873 (g/mol).įinally, to find out how many moles of oxytocin there are in 10 grams, we simply divide the given mass of this substance by its found molar mass: Looking at its chemical formula it is not difficult to obtain:ġ mole of C 43H 66N 12O 12S 2 = (43 moles of С) + (66 moles of H) + (12 moles of N) + (12 moles of O) + (2 moles of S).īy substituting the values of the molar masses of these chemical elements, we get: Suppose now we want to know how many moles of this substance are contained in 10 grams?įirst we have to determine the molar mass of oxytocin. The chemical formula of oxytocin is: C 43H 66N 12O 12S 2. Its main function is to facilitate childbirth, which is one of the reasons it is called the “love drug” or “love hormone.” Oxytocin is a hormone that’s produced in the hypothalamus and released into the bloodstream by the pituitary gland. Example of Mole Value CalculationĬonsider as an example a substance called oxytocin. In this case, our Mole Calculator will be absolutely indispensable. Number of moles = Substance mass / Compound molar mass.Īnd although calculations using this formula do not cause difficulties, they can be very laborious when a substance is determined by its chemical formula. The number of moles of a substance in a sample is obtained by dividing the mass of the sample by the molar mass of the compound: The mole is widely used in chemistry as a convenient way to express amounts of reactants and products of chemical reactions. So, one mole of carbon with the normal isotopic mix is 12.0107 grams.
The mass of one mole of 12C is 12.00 grams exactly, whereas the mass of one mole of 13C is 13.00335483521(23) grams. For example, carbon has two stable isotopes ( 12C and 13C) of ∼ 98.89% and ∼ 1.11% abundance, respectively. The molar mass of a substance depends not only on its molecular formula, but also on the distribution of isotopes of each chemical element present in it. For example, the molar mass of carbon dioxide is approximately 44.01 g/mol. For most practical purposes, the magnitude of molar mass is numerically the same as that of the mean mass of one molecule, expressed in daltons. The amount of substance is the number of moles in the sample. The molar mass of a substance is the mass of 1 mole of that substance in grams.
This number (known as Avogadro number) was chosen so that the mass of one mole of a chemical compound in grams is numerically equal, for most practical purposes, to the average mass of one molecule of the compound in daltons and roughly equivalent to the number of nucleons (protons or neutrons) in the molecule.įor example, one mole of carbon dioxide (CO 2) contains 6.02214076 x 10 23 molecules, whose total mass is about 44.01 grams and the mean mass of one molecule of carbon dioxide is about 44.01 daltons, roughly a combined atomic mass number of 44. One mole is defined to contain exactly 6.02214076 x 10 23 elementary entities (atoms, molecules, ions or electrons). The mole (abbreviated mol) is the SI unit of amount of substance. H₂O) are supported and automatically converted to normal form. H 2O) as well as denoted using the ‘tiny’ numbers, like ₂ or ₅, (e.g. Indices denoted using and html tags (e.g.
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You can enter a formula manually or paste the formula copied from a web page or text document (including DOC or PDF file). The degree of nesting is unlimited but all the brackets should be balanced. Parentheses ( ), square brackets and braces (curly brackets) can be used in the formulas. Indices should be entered as normal numbers after the appropriate elements or groups, e.g. The chemical formula should be entered using the upper case for the first character in the element’s name and the lower case for the second character (compare: Co – cobalt and CO – carbon monoxide). This Mole Calculator finds the quantity of a substance in moles and molar mass of the substance using its chemical formula and known mass of the substance in grams.
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