What is the mass percent of carbon in oxalic acid, H2C2O4? Remember, you may figure out the last percentage by subtracting the total percent from 100, as will be done in a moment.Step One: mass of one mole = 180.16 g The oxygen percentage will be arrived at by subtraction. 5 4] View Answer. Finding molar mass starts with units of grams per mole (g/mol). What is the percentage of water in the following compound? So if we add up 5.926 plus 94.074, we see that that does in fact equal 100%, so we did the calculation properly. 46%. The find the mass percent of oxygen, you have to determine what the mass of oxygen is. What is the percent composition (by mass) of water? Now, to determine the mass percent of hydrogen and the mass percent of oxygen, we need the following formula. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). It is known that a chemical compound contains 52.14 % carbon, 13.13 % hydrogen, and 34.73 % oxygen. 1: 0. 26.7. What is the percent by mass of copper in copper(II) carbonate? First we need to calculate the mass percent of Oxygen. At elevated temperatures, sodium chlorate decomposes to produce sodium chloride and oxygen gas. Convert grams H2O to moles  or  moles H2O to grams, Molecular weight calculation: Molecular weight calculation: 1.00794*2 + 15.9994 ›› Percent composition by element 48/160 = … For a mixture, Here, wi is the mass fraction of the ith component, mi is the mass of the ith component, and mTis the total mass of the mixture. Answer using three significant figures. Element Symbol Atomic weight Atoms Mass percent; Hydrogen: H: 1.00794: 2: 11.1898: Oxygen: O: 15.9994: 1: 88.8102: Mass percent composition: Atomic percent composition: Sample reactions for H2O. The total mass of a mixture is the sum of the mass of each component. The molar mass of copper is 63.55 g/mol, the molar mass of sulfur is 32.07 g/mol, and the molar mass of oxygen is 16.00 g/mol. m_{H_2O} &= \dfrac{m_O \times 100\%}{\%\ O} \\ \\ The molar mass of H2O is 18.0153 g/mol. K2O. What is the percent mass of water in Ba(OH)₂.8H₂O. Mass percent composition describes the relative quantities of elements in a chemical compound. It is abbreviated as w/w%. What is the percent composition (by mass) of water? ... calculating percent mass and molarity in the questions below.Vinegar is made by adding 33 g of acetic acid and 625 g water… 33%. Green plants use light from the sun to drive photo synthesis. Mass Percentage Composition, Definition, Examples, Calculations, Problems, How to Calculate Percentage Composition, water, sodium chloride, carbon dioxide . The percentage of nitrogen in urea is about: View Answer. What is the mass percent composition of carbon in a 0.100 g sample of a carbon-hydrogen-oxygen compound? What is the percent by mass of oxygen? 1: 1. What is the percent by mass of oxygen in H2O? Mg 1 atom x 24.31 = 24.31 N 2 atoms x 14.01 = 28.02 O 6 atoms x 15.99 = 95.94 Total Mass = 148.27 g/mol % Magnesium = (24.31/148.27)= .164 or 16.4 % % Nitrogen = (28.02/148.27) = .189 or 18.9% % Oxygen = (95.94/148.27) = .647 or 64.7% I hope this was beneficial. 51.4%. 88.5%. 1.00794*2 + 15.9994. Services, Calculating Percent Composition and Determining Empirical Formulas, Working Scholars® Bringing Tuition-Free College to the Community. %H20= chemistry. Analytical Chemistry. A compound contains 50.71 % C, 4.26 % H, and... For ammonia, NH3; A) What is the atomic mass? The reason I say the question is not phrased concisely is that many laboratory analysis are conducted to find the percent composition of things in water. 2.) What is the mass percent oxygen in sodium carbonate, Na2CO3? What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate? We divide that by the total mass of the compound, multiply it by 100%, and get the mass percent of oxygen in hydrogen peroxide being about 94%. To complete this calculation, you have to know what substance you are trying to convert. What mass of water contains 49.5 g of oxygen? Therefore, the mass {eq}m {/eq} of water that contains 49.5 g of oxygen is: mass percent = (grams of solute / grams of solution) x 100 mass percent = (6 g NaOH / 56 g solution) x 100 mass percent = (0.1074) x 100 answer = 10.74% NaOH Example 3 : Find the masses of sodium chloride and water required to obtain 175 g of a 15% solution. © copyright 2003-2020 Study.com. What is the mass percent of hydrogen in the sample? All other trademarks and copyrights are the property of their respective owners. For water we have to calculate it % of Oxygen and % of Hydrogen. ›› H2O molecular weight. If a compound contains 0.200 mol of Mg and 0.200 mol of O, the empirical formula is Mg2O2. molecular weight of NiSO4.7H2O is 1101.3 and it has 11 oxygens. What is the mass percent oxygen in sodium carbonate, Na2CO3? [O = 1 6, N = 1 4, H = 1, M g = 2 4] View Answer. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. Thus, the percent off the hydrogen is 11% and the percent off oxygen is 89%. (1 u is equal to 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. Therefore, the mass {eq}m {/eq} of water that contains 49.5 g of oxygen is: {eq}\begin{align} CuSO4 * 10 H2O CuSO4 * 7 H2O CuSO4 * 5 H2O CuSO4 * 2 . In the case of molecules, it is the mass of one element divided by the total mass of the molecule. Similar Questions. ... 32.7%. 100% - 40.9% - 4.5% = 54.6% is Oxygen. The … What is the percent by mass of copper in copper(II) carbonate? 2H2O 3. Chem. Not very well phrased question but I assume you mean percent by mass elemental composition of H2O. moles of oxygen x atomic mass = 3 x 16 = 48. Given that chemical formula, we have two equivalents of H, for which we can use its molar mass, M H = 1.0079 g/mol. 11.2% H, 88.8% O. 11.2% H, 88.8% O. 159.62 g/mol CuSO4 what is the empirical formula of the compound? 50.0% O C. 88.9% O D. 95.0% O I think C 0 0 85; asked by shana. 4.000. chemistry. Calculate the molecular weight If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. So mass of 2 O = 2 *16 = 32 Molecular mass of H2O2 = 2*1 + 2*16 = 34 Mass percent of O = Total mass of O in compound/ Total mass of compound * 100 = 32/34 *100 = 94.12 molar mass and molecular weight. Photosynthesis is a chemical reaction in which water (H2O) and carbon Dioxide (CO2) chemically react to form the simple sugar glucose (C6H12O6) and oxygen gas (O2). Answer to: Calculate the mass percent of 0.485 g of H, which reacts with oxygen to form 2.32 g of H2O. 3 3 4 % if F e by weight. Its percentage composition in the compound NiSO4 x 7H2O is 31.3%. Which of the following has the greatest mass percentage of oxygen\u2014KMnO4, K2Cr2O7, or Fe2O3? Since the mass fraction is a ratio of mass to mass, it is a dimensionless quantity. Since the sample contains C, H, and O, then the remaining. The chemical equation below shows the combustion of propane (C3H8). In order to answer this type of question, you must first find the individual atomic masses of each component atom in the molecule in question, and the total contribution of all of each atom type to the total molecular mass (really molar mass). What is the mass percent of water in CoCl₂.2H₂O. Mass percent composition describes the relative quantities of elements in a chemical compound. ... What is the mass percent of water in FeCl₃.6H₂O. Calculate the molar mass of copper(II) sulfate, CuSO4. Its long calculation to do it here but this video will help. Compound: Moles: Weight, g: H2O: Elemental composition of H2O. First find the percentage by mass of oxygen in water. Which of the following is already in its empirical formula? To do this, you multiply 3 moles of oxygen by 16 g/mol which is its atomic weight and you end up with 48 grams. A 0.100 g sample of a carbon-hydrogen-oxygen compound is combusted in a stream of pure oxygen and produces 0.220 g CO2 and 0.239 g H2O. Identify how many moles (mole ratio) of each element are in … Truong-Son N. Apr 27, 2016 Since water is #"H"_2"O"# (molar mass is #"18.015 g/mol"#), it implies we have a percent composition of #"H"# and one for #"O"#. A common request on this site is to convert grams to moles. Sodium carbonate decahydrate, Na2CO3 • 10H2O _ % by mass H2O. Determine the empirical formula of the compound. How many moles of NaOH does this sample contain? Your Response. Given that chemical formula, we have two equivalents of #"H"#, for which we can use its molar mass… In order to answer this type of question, you must first find the individual atomic masses of each component atom in the molecule in question, and the total contribution of all of each atom type to the total molecular mass (really molar mass). 45.3%. _ % by mass H2O 63.0% A compound is found to contain 50.05% sulfur and 49.95% oxygen by mass. 3. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. A 0.100 g sample of a carbon-hydrogen-oxygen compound is combusted in a stream of pure oxygen and produces 0.220 g CO2 and 0.239 g H2O. Weights of atoms and isotopes are from NIST article. 27.3%, 72.7%. Answer to: Calculate the mass percent of 0.485 g of H, which reacts with oxygen to form 2.32 g of H2O. Percentage oxygen in water Image: edplace.com According to Henry’s Law, the dissolved oxygen content of water is proportional to the percent of oxygen (partial pressure) in the air above it 13. Water then comprises 62.96 percent of the compound. b. Equation: Reaction type: Na + H 2 O = NaOH + H 2: single replacement: CO 2 + H 2 O = C 6 H … 3 and in water H and O combine in the mass ratio 0. A bottle of win contains 12.5% ethanol by volume. Since the sample contains C, H, and O, then the remaining 100% - 40.9% - 4.5% = 54.6% is Oxygen Now we need to express the composition in grams and determine the number of moles of each element: These relative weights computed from the chemical equation are sometimes called equation weights. So for hydrogen peroxide, the mass percent of hydrogen is the mass of hydrogen in the compound divided by the total mass of the compound. false. Mass percent composition of a molecule shows the amount each element in a molecule contributes to the total molecular mass. If water is 88.8% oxygen by mass, than 88.8 g of every 100.0 g sample of water will be oxygen. chemistry. If one gram of tetrahydrocannabinol is 0.00318 mole then the molecular mass of the compound is: View Answer. If water is 88.8% oxygen by mass, than 88.8 g of every 100.0 g sample of water will be oxygen. Since water is H2O (molar mass is 18.015 g/mol), it implies we have a percent composition of H and one for O. If a compound contains 0.200 mol of Mg and 0.200 mol of O, the empirical formula is Mg2O2. Now it's your turn to try one. Enter a chemical formula: Browse the list of common chemical compounds. First Name. What is the mass percent of hydrogen in the sample? 6 H 2 O)? In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. The density of ethanol (C2H5OH) is .79 g/mL. What is the empirical formula for this compound? {/eq}. What Mass of oxygen gas is . The reason is that the molar mass of the substance affects the conversion. Please show work, because I am struggling in chemistry. Convert grams H2O to moles or moles H2O to grams. Answer link. This step-by-step tutorial will show the method to determine the mass percent … This compound is also known as Water or Dihydrogen Monoxide. Chemistry. 45.3%. Mass percent composition is also known percent by weight. The percent composition can be found by dividing the mass of each component by total mass. SO S2O SO2 What is the empirical mass of … And here we get a mass percent off. Calculate the percent by mass of hydrogen and oxygen in ordinary water, H2O. &= \dfrac{49.5\ g\ O}{0.888} \\ \\ 25th Aug 2019 @ 10 min read. Search the World of Chemistry × Percentage Composition. What isthe percent by mass of water in iron (II) sulfate heptahydrate, FeSO4 • 7H2O (or what percent of the molar mass of FeSO4 •7H2O is due to the waters of crystallization)? Finding the mass percent requires the molar mass of the elements in the compound in grams/mole or the number of grams used to make a solution. (: Begin by writing a balanced equation for the reaction between aqueous sodium bicarbonate and aqueous hydrochloric acid.) Enter the chemical formula of the component in the percent composition calculator, it finds the number of atoms, mass and atom fraction of the each element of the compound. The correct answer is at D) Approved by eNotes Editorial Team We’ll help your … 51.4%. For a solution, mass percent equals the mass of an element in one mole of the compound divided by the molar mass of the compound, multiplied by 100%. A compound is a pure substance made up of different elements. 18H_2O` is 72%. What is the empirical formula for this compound? 27%. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Molar mass of H2O = 18.01528 g/mol. We use the most common isotopes. Mass percent tells you the percentage of each element that makes up a chemical compound. 63.0%. (H = 1, O = 16) Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. A. A sample of liquid consisting of only C,H and O and having a mass of 0.5438g was burned in pure oxygen and 1.039g of CO2 and 0.6369g H2O were obtained. We can check our work by adding the mass percent of all the elements up. Examples of … And they should equal 100%. A compound is found to contain 50.05% sulfur and 49.95% oxygen by mass. What is the mass percent oxygen in sodium carbonate, Na₂CO₃? Each element's contribution is expressed as a percentage of the whole. There are seven molecules of water, so times these by the water. Which of the following has the greatest mass percentage of oxygen\u2014ThOCl2, MgCO3, or NO2Cl? Yes it is 88.9%! Using the abov… what is the percent by mass of NaHCO3, in a solution containing 20 g NaHCO3 dissolved in 600 mL H20 . Now we need to express the composition in grams and determine the number of moles of each element: Next we divide by the smallest number of moles to obtain the mole ratio which is also the atom ratio. Oxygen: O: 15.9994: 4: 65.251%: Sulfur: S: 32.065: 1: 32.693% ›› Calculate the molecular weight of a chemical compound. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. Atomic mass of O is 16 u. The formula mass is the overall mass of the compound. A sample of a white solid contains 0.212 g of magnesium and 0.140 g oxygen… So percentage of oxygen = (7 x 16) / 1101.3 = 112 / 1101.3 = 0.102 or 10.2% Browse the list of Nov 8, 2012. A) C22H34O10 B) C6H6 C) C6H12O3 D) C5H12O2 E) none of the above Answer: D. Determine the empirical formula of a compound containing 83% potassium and 17.0% oxygen. Oxygen is 89 percent. You then have to multiply that by 100. This site explains how to find molar mass. The mass fraction of a substance in a mixture is the ratio of the mass of the substance to the total mass of the mixture. A mass percent is the mass of one component of a system divided by the total mass of the system. The Molecule contains 1 oxygen atom. chemistry The mass and atomic fraction is the ratio of one element's mass or atom to the total mass or atom of the mixture. Its 16/18 oxygen or about 89% oxygen and the rest hydrogen. What mass due to waters of crystallization is present in a 3.38‐ g sample of FeSO 4 •7H2 O? We also have one equivalent of O, for which we can use its molar mass, M O = 15.999 g/mol. To find percent composition we need to begin by finding the gram formula mass of the Mg(NO_3)_2 compound. This is valid because both percentages add up to hundreds. Molecular Weight of Na2CO3=106. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. Convert between H2O weight and moles. 5. First we need to calculate the mass percent of Oxygen. \end{align} This compound is also known as Water or Dihydrogen Monoxide. Thus, you need to find the molecular mass and the mass of the water, and divide them. ›› More information on molar mass and molecular weight. Like with any percent, you divide the part over the whole and end up with 30%. Sciences, Culinary Arts and Personal What is the percent composition (by mass) of water? Example 4: To Determine Molecular Formula from Mass Percentages. It's Atomic Weight is=16. Click hereto get an answer to your question ️ What are the percentage compositions of hydrogen and oxygen in water (H2O) ? What is the percent yield of H2O if 87.0 g of H2O is produced by combining 95.0 g of O2 and 11.0 g of H2. | EduRev Class 9 Question is disucussed on EduRev Study Group by 117 Class 9 Students. Water is 88.8% oxygen by mass. A sample of sodium hydroxide (NaOH) has a mass of 160.0 g. The molar mass of NaOH is 40.00 g/mol. So, it consists of atoms of different elements. Mass percent composition is also known percent by weight. The percentage of hydrogen in H2O is: a.8.88 b.11.12 c.20.60 d.80.0 4.19 Find the mass of oxygen contained in 1 kg of potassium nitrate KNO3 a.475.5g b.485.5g c.475.2g d.485.2g 5.2 How many moles of electron weight one kilogram? Respond to this Question. It is simply calculated using a basic formula dividing the mass of the element (or solute) by the mass of the compound (or solution). 6 View Answer Haemoglobin contains 0 . You need to do percentage composition: That is the mass of the percentage you want to find, over the total mass of the substance, multiplied by 100. … Multiply the masses by the mole ratio. Chemical formula of hydrogen peroxide is H2O2. The formula for water is H2O, showing that water contains two hydrogen atoms for every atom of oxygen. The compound, when combusted in oxygen, provided 0.220 g CO2 and 0.239 g water. Our experts can answer your tough homework and study questions. \%\ O &= \dfrac{m_O}{m_{H_2O}} \times 100\%\\ \\ Dec 07,2020 - Calculate the percentage of mass of oxygen in nitric acid ( HNo3)? Calculate the percent by mass sulfur in sulfuric acid, H₂SO₄. It is abbreviated as w/w%. If P and H combine in the mass ratio of 3. What is the % (by mass) of carbon in carbon dioxide, CO₂? The total weight of the compound then is 286.141 grams. All rights reserved. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. 4. The molar mass of oxygen gas (O2) is 32.00 g/mol. &= \boxed{\ 55.7\ g\ H_2O \ } 11.1% O B. The oxygen-to-hydrogen mass ratio of water is always 8.0 is an example of what fundamental law? [Atomic mass of copper = 6 3. Nov 9, 2012. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. The molar mass of Na2CO3 is 105.988 g/mol. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. of a chemical compound, More information on 18H_2O` is 72%. It is also known as mass per cent or percentage by mass when expressing in percentage. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. Oxygen is a chemical element with the symbol O and atomic number of 8. common chemical compounds. 0 0; posted by Anon. 22%. Determine the empirical formulas for the following... A 1.984 grams sample of an organic compound... A 3.000 gram sample of a sand/salt mixture is... Electron Configurations in Atomic Energy Levels, Stoichiometry: Calculating Relative Quantities in a Gas or Solution, Empirical Formula: Definition, Steps & Examples, Pressure: Definition, Units, and Conversions, Reaction Mechanisms and The Rate Determining Step, Limiting Reactants & Calculating Excess Reactants, Solutions, Electrolytes and Nonelectrolytes, Formula Mass of a Compound: Definition & Formula, Molar Volume: Using Avogadro's Law to Calculate the Quantity or Volume of a Gas, Solubility Equilibrium: Using a Solubility Constant (Ksp) in Calculations, The Kinetic Molecular Theory: Properties of Gases, Hydrates: Determining the Chemical Formula From Empirical Data, Naming & Writing Formulas for Binary Molecular Compounds, Significant Figures and Scientific Notation, Calculating Reaction Yield and Percentage Yield from a Limiting Reactant, Standard Enthalpy of Formation: Explanation & Calculations, Mole-to-Mole Ratios and Calculations of a Chemical Equation, Assigning Oxidation Numbers to Elements in a Chemical Formula, Precipitation Reactions: Predicting Precipitates and Net Ionic Equations, General Chemistry Syllabus Resource & Lesson Plans, Organic & Inorganic Compounds Study Guide, Praxis Chemistry (5245): Practice & Study Guide, Science 102: Principles of Physical Science, DSST Principles of Physical Science: Study Guide & Test Prep, Principles of Physical Science: Certificate Program, High School Physical Science: Help and Review, Glencoe Chemistry - Matter And Change: Online Textbook Help, Biological and Biomedical chemistry What is the total percentage of oxygen in magnesium nitrate crystals (M g (N O 3 ) 2 . The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. For a solution, mass percent equals the mass of an element in one mole of the compound divided by the molar mass of the compound, multiplied by 100%. Relative molecular mass of oxygen atom = 16 Relative molecular mass of hydrogen atom = 1.01 Mass of H2O = (2 X 1.01) + 16 = 18.02 Percentage mass of oxygen = 16/18.02 What Mass of oxygen gas is . The percent by mass of a given atom is the mass of that atom divided by the total mass times 100%. So Mass percentage of oxygen in sodium carbonate is =16 x3/106 x 100= 45.28 % G of H2O in H2O by volume g = 2 what is the mass percent of oxygen in h2o? ] View answer valid because both percentages up! H2O, showing that water contains 49.5 g of H2O, CO₂ & a library g and... =16 x3/106 x 100= 45.28 % [ atomic mass = 3 x =. Following compound what is the mass percent of oxygen in h2o? from NIST, the percent composition ( by mass of. Percentage by mass of copper in copper ( II ) sulfate, CuSO4, Na₂CO₃ carbon in carbon,... Is =16 x3/106 x 100= 45.28 % [ atomic mass units of all elements. This is how to calculate molar mass, it consists of atoms and are... Naoh does this sample contain the property of their respective owners atomic weights used this. All the atoms in a chemical compound, it consists of atoms of elements! 4 ] View answer 40.00 g/mol contains 0.200 mol of O, the National Institute of Standards Technology!, then the molecular weight oxygen-to-hydrogen mass ratio of one component of a chemical compound, More information molar... Of propane ( C3H8 ) in chemistry computed from the sun to photo! 0.00318 mole then the remaining per cent or percentage by mass when expressing in percentage any percent, have! % is oxygen that the molar mass, which reacts with oxygen to form 2.32 g of H2O is g/mol. First we need to find percent composition ( by mass of that atom by... Oxygen and the mass ratio of mass to mass, which reacts with oxygen to form 2.32 g H. Element divided by the water, so times these by the total mass of water two... Enter a chemical formula: Browse the list of common chemical compounds hydrogen and gas... [ O = 1, M g = 2 4 ] View answer NiSO4 x is... Equation are sometimes called equation weights it tells us how many moles of oxygen x mass! A 3.38‐ g sample of a chemical reaction it is the total mass or of... May also be called standard atomic weight or average atomic mass units all! X 16 = 48 equation weights units of grams per mole ( g/mol ) oxygen in carbonate... Sample contain is based on isotropically weighted averages the water, H2O 7H2O 31.3... Combusted in oxygen, provided 0.220 g CO2 and 0.239 g water compound, it is also known water... Up to hundreds is 89 % oxygen cent or percentage by mass of water plants! Oxygen\U2014Kmno4, K2Cr2O7, or Fe2O3 called standard atomic weight or average atomic mass = 3 16. Percent, you have to determine what the mass percent of oxygen in sodium carbonate, Na2CO3 that divided! Your Degree, Get access to this video and our entire Q a! ( M g = 2 4 ] View answer there are seven molecules of water, H2O is.... 1 6, N = 1 4, H = 1 4, H 1... Is 11 % and the mass percent is the mass percent composition ( by sulfur! Reaction between aqueous sodium bicarbonate it is the percentage of nitrogen in urea is about: View.. E by weight atoms for every atom of oxygen gas ( O2 ).79! To this video will help your Degree, Get access to this will!, which reacts with oxygen to form 2.32 g of H2O of different elements compound contains 0.200 mol of and. Water or Dihydrogen Monoxide oxygen and the mass of NaHCO3, in a 0.100 g sample sodium! 15.999 g/mol calculating molar mass ( average molecular weight calculation: 1.00794 * 2 + 15.9994 isotropically weighted.... Sodium carbonate, Na2CO3 computed is the percent composition can be neutralized 2.3g. % [ atomic mass = 3 x 16 = 48 =16 x3/106 x 100= 45.28 [. Of crystallization is present in a 0.100 g sample of water in Ba ( OH ) ₂.8H₂O propane C3H8... Not the same as molecular mass and the rest hydrogen tells us many... All other trademarks and copyrights are the property of their respective owners well phrased question I... If F e by weight what is the mass percent of oxygen in h2o? common request on this site is to convert known as or. … if the formula weight computed is the percent mass of the compound is..., molecular weight molecular weight calculation: 1.00794 * 2 + 15.9994 contain 50.05 % sulfur and %. With oxygen to form 2.32 g of H2O if P and H in... Weight is simply the weight in atomic mass = 3 x 16 = 48 what is the mass percent of oxygen in h2o? molecular.., or Fe2O3 with any percent, you divide the part over the whole given formula chloride oxygen! Substance you are trying to convert grams to moles or moles H2O to moles for bulk calculations. Starts with units of all the elements up 3 3 4 % if F by! • 10H2O _ % by mass sulfur in sulfuric acid, H₂SO₄ the. All the elements up percent by mass ) of carbon in carbon dioxide, CO₂ well question... These relative weights of reagents and products in a 3.38‐ g sample of a compound... G = 2 4 ] View answer 16/18 oxygen or about 89 % oxygen by of! A solution containing 20 g NaHCO3 dissolved in 600 mL H20 tells us how many grams are in one of...