general-chemistry; 0 Answers. The number of Sr is the same so if the compound has the smallest gram formula mass, it has the highest percent composition by mass of strontium. H2SO4 . 88.89% Formic acid ----- 32/46. For example of these compounds: Answer Save. Mass percent composition of a molecule shows the amount each element in a molecule contributes to the total molecular mass. Each element's contribution is expressed as a percentage of the whole. (a) BCl3 (b) AsCl3 (c) GaCl3 (d) AlCl3 (e) PCl3. Which of the following compounds has the highest mass percent of "O"? This compound has the highest ratio of oxygen atoms to chromium atoms and therefore has the greatest mass percent of oxygen. Best answer. (Determined by multiplying the subscripts of … Problem: Which of these compounds contains the greatest percentage of nitrogen? Explanation: Step 1: Data given. Examples: Fe, Au, Co, Br, C, O, N, F. #H_2O# The number of moles in 12.0 g of C 2 6. 3/2. Use the following equation to determine the mass percent of in each compound. 1 answer. Water is H2O which is 18 g/mol. 1 Approved Answer. In order to determine percent composition of the elements in a compound, the molar mass (MM) of each element is divided by the MM of the compound and multiplied by 100. 32. lulu1991. Given : Mass of compound = 20.00 g. Mass of Zn = 16.07 g. Find: % Composition (% Zn and %O) List other known quantities. 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. An empirical formula is a formula for a compound that gives the smallest whole number ratio of each type atom. A) MnO B) MnO2 C) Mn2O3 D) Mn3O2 E) none of the above. 0 votes. 5 5. comments. The percent composition can be found by dividing the mass of each component by total mass. a) C6H3N3O7 b) CH4N2O c) LiNH2 d) Pb(N3)2 FREE Expert Solution Show answer. First find the molar masses of all of the compounds: SrCl2 = 158.53g/mol SrI2 = 341.43g/mol SrO = 103.62g/mol SrS = 119.68g/mo Then find the molar mass of Sr in each of the compounds. Login. Divide the mass of hydrogen in each compound by the molar mass of the compound and multiply by 100. Calculate the percent by weight of sodium (Na) and chlorine (Cl) in sodium chloride (NaCl) Calculate the molecular mass (MM): MM = 22.99 + 35.45 = 58.44 ; Calculate the total mass of Na present: Disclaimer: I'm going to estimate all my masses. Dr W. Lv 7. #HCl# Pour autoriser Verizon Media et nos partenaires à traiter vos données personnelles, sélectionnez 'J'accepte' ou 'Gérer les paramètres' pour obtenir plus d’informations et pour gérer vos choix. grendeldekt and 54 others learned from this answer. 1. This thread is archived. (1) SrC12 (2) SrI2 (3) SrO (4) SrS. H2O2. Which of the following compounds has the highest mass percent of "O"? Since there is only one Sr in every compound, the mass will be the same: 87.62g/mol Sr Now divide the molar mass of Sr by each of compounds' masses: This compound has the highest ratio of oxygen atoms to chromium atoms and therefore has the greatest mass percent of oxygen. Yahoo fait partie de Verizon Media. Recall that subscript in formula represents the number of atoms in the compound. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. 85% (159 ratings) ... Our tutors have indicated that to solve this problem you will need to apply the Mass Percent Formula concept. Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. ... that I might consider in its place. empirical formula A formula for a compound that gives the smallest whole-number ratio of each type of atom. Which of the following compounds has the highest mass percent of chlorine? in a given compound, that element has the highest mass percentage in the compound. For C3H6O, carbon will have the highest mass percent. Mass is about 32 g/mol. 2. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%. This step-by-step tutorial will show the method to determine the mass percent composition of … a) CO. For the given compound both elements are present in 1:1 ratio so the element which has higher atomic weight has the higher mass % composition, So O has higher mass % composition for the given compound. Which compound has the highest percent com­position by mass of strontium? SOLUTION: By calculating for the mass percent of oxygen in each of the choices, we find that choice c. {eq}Mg(NO_3)_2 {/eq} has the highest mass percent of oxygen. You will now have a number between 0 and 1. 4.4/5. Find the molecular mass of the entire compound. C) Mn3O2. Compound X 2 2 2 2. Kshitij G answered on June 06, 2015. What carbon compounds have the highest percentage of carbon by mass (or volume)? Steps to calculating the percent composition of the elements in an compound. 118. around the world. Here, number of carbon atom is same in each compound. (a) \mathrm{BCl}_{3} (b) \mathrm{As} \mathrm{Cl}_{3} (c) \mathrm{GaCl}_{3} (d) \math… Mass of oxygen = 20.00 g - 16.07 g = 3.93 g O. In MgS, it is ~57% mass S. In BaS, the heaviest 2A element you listed, it is ~19% S. The way to determine this is by dividing the molar mass of sulfur by the molar mass of the compound and multiplying by 100. 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