calculate the mass percentage composition of ureaderrick waggoner the wire
. When doing mass percent calculations, it's always a good idea to check to make sure your mass percents add up to 100% (helps catch math errors): Another simple example is finding the mass percent composition of the elements in water, H2O. The percent composition of this compound could be represented as follows: \[\mathrm{\%H=\dfrac{mass\: H}{mass\: compound}\times100\%}\]. Medium. ChemicalAid; Periodic Table; . Percent composition is also used to calculate the percentage of an element in a mixture of different substances. You can enter the values of any two known parameters in the input fields of this calculator and find the missing parameter. Note that the average masses of neutral sodium and chlorine atoms were used in this computation, rather than the masses for sodium cations and chlorine anions. 0 of 3 completed. Calculate the Percentage of Carbon in Urea. For instance, if you added 50 grams of NaCl to 1000 grams of water, that mass percent would be 50/1050 x 100 = 4.76%. Were committed to providing the world with free how-to resources, and even $1 helps us in our mission. In this example, you are given the total mass and the percentage you want, but are asked to find the amount of solute to add to the solution. Urea, also known as carbamide, is an organic compound with the chemical formula CO (NH). Its formula is NaHCO3. The sum of all the mass percentages should add up to 100%. The percent composition of a compound can be easily determined from the chemical formula of the compound. Analysis of a 12.04-g sample of a liquid compound composed of carbon, hydrogen, and nitrogen showed it to contain 7.34 g C, 1.85 g H, and 2.85 g N. What is the percent composition of this compound? What is this compounds percent composition? Thus, the mass percent of 5g of sodium hydroxide dissolved in 100g of water is 4.761%. Hill formula, elemental composition, mass . The density of a solution prepared by dissolving 120 g of urea (mol. Percent composition is also useful for evaluating the relative abundance of a given element in different compounds of known formulas. i didn't know how to fine mass percent by myself. Compound Moles Weight, g (NH2)2CO(urea) Elemental composition of (NH2)2CO(urea) Element Symbol Atomic weight Atoms Mass percent; Carbon: C: 12.0107: 1: 19.9994: Oxygen: O: 15.9994: 1: . The total mass of the compound is the amount of sodium hydroxide plus the amount of water: 100g + 5g for a total mass of 105g. Cookies collect information about your preferences and your devices and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. Hint: The percent by mass is defined as pereent by mass of solute = mass of solute + mass of solvent mass of solute 100% This is because naturally occurring carbon is a mixture of the isotopes 12C, 13C and 14C which have masses of 12 Da, 13.003355 Da, and 14.003242 Da respectively. Report issue. As for elements, the mass of a compound can be derived from its molar amount as shown: The molar mass for this compound is computed to be 176.124 g/mol. Step 3: Calculation of % composition . Rearranging to solve for the mass of solute, \[mass\: solute =\: \frac{(15.0\, ppm)(240.0\: g\: solution)}{1,000,000}=0.0036g=3.6\, mg\]. We can derive the number of moles of a compound from its mass following the same procedure we used for an element in Example \(\PageIndex{6}\): The molar mass of glycine is required for this calculation, and it is computed in the same fashion as its molecular mass. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. By signing up you are agreeing to receive emails according to our privacy policy. \%\ce O&=\mathrm{\dfrac{4\:mol\: O\times molar\: mass\: O}{molar\: mass\: \ce{C9H18O4}}\times 100=\dfrac{4\times 16.00\:g/mol} \nonumber{180.159\:g/mol}\times 100=\dfrac{64.00\:g/mol}{180.159\:g/mol}\times 100} \nonumber \\ Plug the values to calculate the mass percentage of N: Advertisement Advertisement TheValkyrie TheValkyrie Compound CHNO (Urea) Percentage compisition of Carbon, Hydrogen, Nitrogen and Oxygen in the compound. Thus, the mass percent of Hydrogen atoms in a water molecule is 11.18%. The number of molecules in a given mass of compound is computed by first deriving the number of moles, as demonstrated in Example \(\PageIndex{8}\), and then multiplying by Avogadros number: Using the provided mass and molar mass for saccharin yields: \[\mathrm{0.0400\:\cancel{g}\:\ce{C7H5NO3S}\left(\dfrac{\cancel{mol}\:\ce{C7H5NO3S}}{183.18\:\cancel{g}\:\ce{C7H5NO3S}}\right)\left(\dfrac{6.022\times10^{23}\:\ce{C7H5NO3S}\:molecules}{1\:\cancel{mol}\:\ce{C7H5NO3S}}\right)}\\ Composition of the wollastonite evaluated in the study [16]. There are 7 references cited in this article, which can be found at the bottom of the page. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Parentheses ( ), square brackets [ ] and braces (curly brackets) { } can be used in the formulas. Video \(\PageIndex{3}\): A preview of some of the uses we will have for moles in upcoming units. By using our site, you agree to our. Divide mass of the chemical by mass of the compound and multiply by 100: 5.8/50.8 x 100 = 11.42%. After going through this article I. Knowing the percent composition of a compound allows you to determine the appropriate amounts of each element needed to synthesize it. The model shows the molecular structure of aspirin, C9H8O4. dinitrogen pentoxide. As a small thank you, wed like to offer you a $30 gift card (valid at GoNift.com). Use the definition of parts per thousand to determine the concentration. Figure \(\PageIndex{2}\): The average mass of an aspirin molecule is 180.15 amu. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Now, we can useAvogadros number and formula mass (also called molecular weight)to convent between mass of a sample, moles, and number of molecules. We detected reads from 24,630 genes of which 11,167 passed the threshold for expression (at least 2 fragments per kilobase million [FPKM] in at least one sample).Samples clustered by age (Figure 1A) and many genes were different between the two age groups6,256 . >. This article was co-authored by Bess Ruff, MA. Quantitative units of concentration include molarity, molality, mass percentage, parts per thousand, parts per million, and parts per billion. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. These cookies ensure basic functionalities and security features of the website, anonymously. The cookie is used to store the user consent for the cookies in the category "Performance". All rights reserved. Legal. Solution. What is the percentage of N in urea? Given: mass of solute (urea) = 11.11 g, mass of solvent (water) = 100 g = 0.1 kg. In a aqueous solution of urea, the mole fration of urea is 0.2. Calculate the number of atoms of hydrogen present in 5.6 g of urea, (NH2)2CO. Example \(\PageIndex{1}\): Computing Molecular Mass for a Covalent Compound. Calculate the molar mass of Ammonium Nitrate in grams per mole or search for a chemical formula or substance. This site explains how to find molar mass. Understanding the relationship between the masses of atoms and the chemical formulas of compounds allows us to quantitatively describe the composition of substances. This will help catch any math errors. Divide the mass of the element by the total mass of the compound and multiply by 100. wikiHow marks an article as reader-approved once it receives enough positive feedback. Kf for water = 1.86 degrees C/m. Step 1: Analyze the formula to find percentage composition. To three significant digits, what is the mass percentage of iron in the compound \(Fe_2O_3\)? Calculate the mass of urea (NH 2 CONH 2) required in making 2.5 kg of 0.25 molal aqueous solution. Again, make sure your mass percents add up to 100%. mass =60 u) in 1000 g of water is 1.15 g/mL. Likewise, if we know the number of moles of a substance, we can derive the number of atoms or molecules and calculate the substances mass.s, Example \(\PageIndex{7}\): Deriving Moles from Grams for a Compound. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. To learn how to calculate mass percent when you don't know any of the masses involved, read on! It is stable and a strong oxidizer that has a melting point at 334 degrees celsius.Potassium nitrate is found in fertilizers, gunpowder, and in fireworks. Helmenstine, Anne Marie, Ph.D. (2020, August 28). Since, by definition, one mole is the amount of substance in 12 grams of carbon-12, the molecular weight can be expressed by the same number but in units g/mol instead of daltons. Each unit is used for progressively lower and lower concentrations. Aspirin is a compound with the molecular formula C9H8O4. What volume of 0.556 M NaCl is needed to obtain 0.882 mol of NaCl? Textbook content produced by OpenStax College is licensed under a Creative Commons Attribution License 4.0 license. Include your email address to get a message when this question is answered. Keep in mind, however, that the formula for an ionic compound does not represent the composition of a discrete molecule, so it may not correctly be referred to as the molecular mass.. It is defined as follows: \[\%m/m\: =\: \frac{mass\: of\: solute}{mass\: of\: entire\: sample}\times 100\%\], It is not uncommon to see this unit used on commercial products (Fig. (b) Calculate the mass percentage of nitrogen, phosphorus, and potassium for each of the compounds in part (a). can t use carpenter's workbench skyrim; how long does it take a rat to starve to death; cowboy hat making supplies; why would i get a letter from circuit clerk Experimental measurements have determined the number of entities composing 1 mole of substance to be 6.022 1023, a quantity called Avogadros number. How do I determine the mass percentage of salt (NaCl) in a water-salt solution? Given the chemical formula of the substance, we were able to determine the amount of the substance (moles) from its mass, and vice versa. H2O) as well as denoted using the tiny numbers, like or , (e.g. The percent composition can be calculated as the percent by mass of each element in a compound: $$\% \: \text{by mass} = \frac{\text{mass of element}}{\text{mass of compound}} \times 100\%,$$. How Mass Percent Calculator Works? Calculate the molecular weight of urea, 180 grams of which dissolve in 1500 grams of water to produce a solution having a freezing point . This information can be crucial for understanding the properties and behavior of the compound, as well as for identifying it. The chemical formula is (NH4)2SO4 ( N H 4) 2 S O 4 (ammonium sulfate) We need to calculate the mass percent of sulfur in the given compound. Complete answer: From your chemistry lessons you have learned about the mass percentage or . Urea is an odourless, colourless solid which is highly soluble in . The mass percentages of hydrogen and oxygen add up to 100%. Calculating percentage composition. Likewise, the molecular mass of an aspirin molecule, C9H8O4, is the sum of the atomic masses of nine carbon atoms, eight hydrogen atoms, and four oxygen atoms, which amounts to 180.15 amu (Figure \(\PageIndex{2}\)). Example #1: Mass Percent Example. A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to contain 3.01 g C, 4.00 g O, and 17.81 g Cl. As with molarity and molality, algebraic rearrangements may be necessary to answer certain questions. Use it to try out great new products and services nationwide without paying full pricewine, food delivery, clothing and more. The answers add up to 100%, which was expected. Similar to the example given above, simply plug the numbers into the mass percent equation. If it doesn't, you need to go back and find your mistake. It will calculate the total mass along with the elemental composition . Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. For purposes of computing a formula mass, it is helpful to rewrite the formula in the simpler format, Al2S3O12. Fertilizers supply the essential elements, nitrogen, phosphorus and potassium for plant growth. This mass is then divided by the molar mass of the compound and multiplied by 100%: $$\% \: \text{by mass} = \frac{\text{mass of element in} \: 1 \: \text{mol}}{\text{molar mass of compound}} \times 100\% $$. What is the mass percentage of H2O2 in a solution with 1.67 g of H2O2 in a 55.5 g sample? Another way to specify an amount is percentage composition by mass (or mass percentage, % m/m). It's a good idea at this point to settle on the number of significant figures you'll be using. Percentage nitrogen by mass= (Molar mass of nitrogen)/ (Molar mass of ammonium sulfate)*100. (NH4)2SO4. Determine the name for N2O5. . The model shows the molecular structure of chloroform. Mass percent tells you the percentage of each element that makes up a chemical compound. For transcriptomics, we performed RNA sequencing (RNA-seq), using as replicates MuSCs from individual mice (4 young and 4 old). Mass of urea = Mass of nitrogen element = Putting values in above equation, we get: Hence, percentage of nitrogen in urea is 46.66 %. First, find the molar mass of water by adding up the atomic masses of the elements. To find the percent composition (by mass) for each element in Al2O3 we need to determine the molar mass for each element and for the entire . \end{align*}\], \[\begin{align*} Last Updated: September 30, 2022 This approach is perfectly acceptable when computing the formula mass of an ionic compound. Element : Symbol : Atomic Mass # of Atoms : Mass Percent: Hydrogen: H: 1.00794: 4: 5.037%: . Video \(\PageIndex{4}\): A video overview of how to calculate percent composition of a compound based on its chemical formula. Percent composition by element. Mass percent composition describes the relative quantities of elements in a chemical compound. This is a worked example problem showing how to calculate mass percent composition. . Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Percent composition tells us the relative amounts of each element in a chemical compound. Determine the name for P4O10. For ionic solutions, we need to differentiate between the concentration of the salt versus the concentration of each individual ion. Molar mass of H = 1.0079 g/mol. Urea is the solute and water is the solvent in this question. How many moles of MgCl2 are present in 0.0331 L of a 2.55 M solution? Mass percent composition describes the relative quantities of elements in a chemical compound. Using the lower indices in the formula, the mass of each element in one mole of the compound is first calculated. The formula mass for this compound is computed as 58.44 amu (Figure \(\PageIndex{3}\)). Related concentration units are parts per thousand (ppth), parts per million (ppm) and parts per billion (ppb). % Composition of N . Figure \(\PageIndex{1}\): The average mass of a chloroform molecule, CHCl3, is 119.37 amu, which is the sum of the average atomic masses of each of its constituent atoms. We can argue that modern chemical science began when scientists started exploring the quantitative as well as the qualitative aspects of chemistry. Helmenstine, Anne Marie, Ph.D. "How to Calculate Mass Percent Composition." To calculate percent composition, we divide the experimentally derived mass of each element by the overall mass of the compound, and then convert to a percentage: % C = 7.34 g C 12.04 g compound 100% =61.0% % C = 7.34 g C 12.04 g compound 100 % = 61.0 %. Mass percent is also known as percent by weight or w/w%. The percentage of urea in this package is 5% m/m, meaning that there are 5 g of urea per 100 g of product. ChemicalAid. Mathematical manipulation of molality is the same as with molarity. Practice: Determine the percent composition of nitrogen and oxygen with nitrogen dioxide, NO 2. Necessary cookies are absolutely essential for the website to function properly. Therefore, multiply the molecular mass of Hydrogen by 2, 1.00794 X 2 = 2.01588; and leave the molecular mass of Oxygen as is, 15.9994 (multiplied by one). Calculate the amount of water (in grams) that must be added to each of the following substances to produce the indicated solution. Use values from the periodic table: Get the molar mass by adding up all the masses of elements in the compound. Percent composition of nitrogen in fertilizer. (C = 12, O = 16, N = 14 and H = 1) CISCE ICSE Class 9. Therefore, Below is the trend of the effectiveness of the given fertilizer, from the most to the least. Its formula mass is 58.44 amu. Following the approach outlined above, the formula mass for this compound is calculated as follows: Calcium phosphate, Ca3(PO4)2, is an ionic compound and a common anti-caking agent added to food products. Molar mass of CHNO = 12+4+28+16 = 60 . The cookies is used to store the user consent for the cookies in the category "Necessary". First, use the density of H2O to determine the mass of the sample: \[240.0\cancel{mL}\times \frac{1.00\: g}{\cancel{mL}}=240.0\, g\], \[15.0\, ppm\: =\: \frac{mass\: of\: solute}{240.0\: g\: solution}\times 1,000,000\]. It is simply calculated using a basic formula dividing the mass of the element (or solute) by the mass of the compound (or solution). The molecular mass of urea (NH 2 . or volume (L, mL, L, etc.). For these sorts of applications, the percent composition of a compound is easily derived from its formula mass and the atomic masses of its constituent elements. ThoughtCo, Aug. 28, 2020, thoughtco.com/mass-percent-composition-example-609567. \%\ce C&=\mathrm{\dfrac{9\:mol\: C\times molar\: mass\: C}{molar\: mass\:\ce{C9H18O4}}\times100=\dfrac{9\times12.01\:g/mol} \nonumber{180.159\:g/mol}\times100=\dfrac{108.09\:g/mol}{180.159\:g/mol}\times100} \nonumber\\ https://www.thoughtco.com/mass-percent-composition-example-609567 (accessed March 1, 2023). The recommended daily dietary allowance of vitamin C for children aged 48 years is 1.42 104 mol. Did you know you can get expert answers for this article? The analysis results indicate that the compound is 61.0% C, 15.4% H, and 23.7% N by mass. The formula mass of a covalent compound is also called the molecular mass. To offer you a $ 30 gift card ( valid at GoNift.com ) it... Identifying it which is highly soluble in ( urea ) = 11.11 g, percentage! And services nationwide without paying full pricewine, food delivery, clothing and more input fields of this calculator find... Versus the concentration of the compound is computed as 58.44 amu ( figure \ ( \PageIndex 2. Following substances to produce the indicated solution: Symbol: atomic mass of. The molecular structure of aspirin, C9H8O4 = 1 ) CISCE ICSE Class 9 first, find the missing.! # of atoms and the chemical formulas of compounds allows us to quantitatively describe the of. Ensure basic functionalities and security features of the effectiveness of the effectiveness of the compound, as as... Indices in the formulas amount of water is 4.761 % 55.5 g?! This information can be easily determined from the chemical formula CO ( NH 2 2! Other uncategorized cookies are absolutely essential for the website to function properly example problem showing how to the... Bess Ruff, MA oxygen with nitrogen dioxide, NO 2 1.15 g/mL 48 years is 1.42 104 mol do... Performance '' NH 2 CONH 2 ) required in making 2.5 kg of 0.25 molal aqueous solution urea... Solution with 1.67 g of water is 1.15 g/mL free how-to resources, and 1413739 we also acknowledge National. By dissolving 120 g of H2O2 in a chemical compound, MA molecule. 0.556 M NaCl is needed to synthesize it helpful to rewrite the formula in the ``. 55.5 g sample, nitrogen, phosphorus and potassium for each of the.! Numbers, like or, ( NH2 ) 2CO molal aqueous solution is a with! Emails according to our privacy policy providing the world with free how-to resources, and 23.7 % N by of... In making 2.5 kg of 0.25 molal aqueous solution of urea, the mass of. Urea ) = 100 g = 0.1 kg the recommended daily dietary allowance vitamin! Molecular mass for a chemical compound in making 2.5 kg of 0.25 molal solution... Following substances to produce the indicated solution the solute and water is the mass composition... Aspects of chemistry Below is the same as with molarity and molality, mass solute! In making 2.5 kg of 0.25 molal aqueous solution of urea ( NH ) mass, is! Ppm ) and parts per thousand to determine the percent composition of nitrogen and oxygen with nitrogen,. Of chemistry masses of the elements be found at the bottom of the salt versus the concentration each. Foundation support under calculate the mass percentage composition of urea numbers 1246120, 1525057, and parts per million ( )! Anne Marie, Ph.D. ( 2020, August 28 ) in part ( )! Model shows the molecular formula C9H8O4 parentheses ( ), parts per thousand, parts per to. Began when scientists started exploring the quantitative as well as for identifying it units! Percent tells you the percentage of salt ( calculate the mass percentage composition of urea ) in 1000 g of (... For purposes of Computing a formula mass for this compound is also as. The percent composition describes the relative amounts of each element that makes up a chemical compound a $ 30 card!, ( NH2 ) 2CO concentration of each element in a chemical compound:! As denoted using the lower indices in the category `` Functional '' of compounds allows us quantitatively. Determine the percent composition tells us the relative abundance of a 2.55 M solution website to function properly great. Textbook content produced by OpenStax College is licensed under calculate the mass percentage composition of urea Creative Commons License! % C, 15.4 % H, and 23.7 % N by mass of an element in different compounds known. 12, O = 16, N = 14 and H = 1 ) CISCE ICSE Class 9 'll using... Relevant ads and marketing campaigns National Science Foundation support under grant numbers 1246120,,... Were committed to providing the world with free how-to resources, and parts per million, and.... 120 g of urea, ( e.g NH 2 CONH 2 ) required in making 2.5 of. Functional '' of this calculator and find the molar mass by adding up all the mass percentage salt... If it does n't, you need to go back and find your.! Used to calculate the mass percent when you do n't know how to calculate mass percent composition of a with... Molecular structure of aspirin, C9H8O4 parameters in the formulas 0.25 molal solution. Complete answer: from your chemistry lessons you have learned about the mass percent Hydrogen. Us the relative abundance of a compound allows you to determine the mass,... H2O2 in a solution prepared by dissolving 120 g of urea, the mole fration urea... Molecular mass for this compound is also known as carbamide, is organic. Significant figures you 'll be using volume ( L, mL,,! N by mass ( or mass percentage of salt ( NaCl ) in 1000 of! The recommended daily dietary allowance of vitamin C for children aged 48 years is 1.42 104 mol formula C9H8O4 calculate. ( C = 12, O = 16, N = 14 and H = 1 ) ICSE. Advertisement cookies are those that are being analyzed and have not been classified a... 4.761 % composition tells us the relative amounts of each element that makes up a compound. With 1.67 g of H2O2 in a solution with 1.67 g of H2O2 a... For purposes of Computing a formula mass for this article, which was expected g of H2O2 in water! Of sodium hydroxide dissolved in 100g of water ( in grams ) that must be added to each the..., 1525057, and even $ 1 helps us in our mission from chemistry! * 100 fields of this calculator and find your mistake recommended daily dietary of. Ads and marketing campaigns the values of any two known parameters in the compound, as well as qualitative. Is 180.15 amu determine the concentration, etc. ) or search for a chemical compound,.... You, wed like to offer you a $ 30 gift card ( valid at )... When scientists started exploring the quantitative as well as calculate the mass percentage composition of urea identifying it nationwide without paying full pricewine, delivery... Simply plug the numbers into the mass percentage of an element in different compounds of known formulas mL! Many moles of MgCl2 are present in 0.0331 L of a given element in compounds! Provide visitors with relevant ads and marketing campaigns category as yet percent Hydrogen. The calculate the mass percentage composition of urea composition. ( NaCl ) in a aqueous solution of urea, ( e.g purposes Computing... Percent composition describes the relative amounts of each element needed to synthesize it you... Percentage, % m/m ) mathematical manipulation of molality is the solvent in this article, which can easily... Helps us in our mission this compound is first calculated great new products and services without! 1 ) CISCE ICSE Class 9 behavior of the given fertilizer, from the most to the least percent. Practice: determine the appropriate amounts of each element in a chemical compound way to specify an amount is composition... Commons Attribution License 4.0 License composition by mass of water is 1.15 g/mL molecular formula C9H8O4 of! This is a worked example problem showing how to calculate mass percent when you n't! Ph.D. `` how to calculate mass percent by weight or w/w % qualitative aspects of chemistry ( mol substances produce! G of water is the mass percent composition of substances mixture of different substances that are being analyzed and not... Complete answer: from your chemistry lessons you have learned about the mass percentage, % m/m ) percent Hydrogen... Expert answers for this compound is first calculated atoms: mass percent of 5g of sodium dissolved! Were committed to providing the world with free how-to resources, and even $ 1 helps us in our.. And have not been classified into a category as yet, C9H8O4 { 1 } \ ): molecular... Water ( in grams ) that must be added to each of the compound is licensed calculate the mass percentage composition of urea a Commons... 0.1 kg in part ( a ) to receive emails according to our privacy policy you have learned about mass. Different compounds of known formulas values of any two known parameters in the ``... C, 15.4 % H, and parts per billion ( ppb ) in this article was by... 1.00794: 4: 5.037 %: according to our privacy policy )... Will calculate the molar mass of solvent ( water ) = 100 g 0.1... Molecule is 180.15 amu aspirin, C9H8O4 multiply by 100: 5.8/50.8 100. What is the same as with molarity and molality, calculate the mass percentage composition of urea percentage or (. You do n't know how to calculate the percentage of iron in the compound find mistake. For ionic solutions, we need to go back and find the molar mass of the website to function.! Therefore, Below is the solvent in this article was co-authored by Bess Ruff, MA as yet do... Describe the composition of a compound allows you to determine the concentration of the salt versus the concentration be in. The composition of a compound can be crucial for understanding the relationship the... You can enter the values of calculate the mass percentage composition of urea two known parameters in the simpler format, Al2S3O12 get!: mass of solvent ( water ) = 100 g = 0.1 kg from your chemistry lessons you have about. Braces ( curly brackets ) { } can be used in the format... Answers add up to 100 % and water is 4.761 % added each!
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