Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. 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. The molar mass of of Oxygen and carbon are more or less the same. Favorite Answer. This thread is archived. H2O . #H_2S# Which of the following samples has the largest number of ions? This program determines the molecular mass of a substance. so let's assume we have 1 mole of each compound. 85% (159 ratings) ... Our tutors have indicated that to solve this problem you will need to apply the Mass Percent Formula concept. 0 votes. Nos partenaires et nous-mêmes stockerons et/ou utiliserons des informations concernant votre appareil, par l’intermédiaire de cookies et de technologies similaires, afin d’afficher des annonces et des contenus personnalisés, de mesurer les audiences et les contenus, d’obtenir des informations sur les audiences et à des fins de développement de produit. It will calculate the total mass along with the elemental composition and mass of each element in the compound. Which of the following compounds has the highest mass percent of "O"? 1 Answer. 3. Degrees Brix (symbol °Bx) is the sugar content of an aqueous solution. Use the following equation to determine the mass percent of in each compound. Determine the mass percent of in. Dr W. Lv 7. Vous pouvez modifier vos choix à tout moment dans vos paramètres de vie privée. The mass and atomic fraction is the ratio of one element's mass or atom to the total mass or atom of the mixture. Anonymous. 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. (1) SrC12 (2) SrI2 (3) SrO (4) SrS. D) MnO2. Find the molar mass of all the elements in the compound in grams per mole. H2S . 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: Steps to calculating the percent composition of the elements in an compound. One degree Brix is 1 gram of sucrose in 100 grams of solution and represents the strength of the solution as percentage by mass.If the solution contains dissolved solids other than pure sucrose, then the °Bx only approximates the dissolved solid content. Mass percent tells you the percentage of each element that makes up a chemical compound. In the case of carbon monoxide the ratio of the mass of carbon and oxygen present is 12:16 and in the case of carbon dioxide it is 12:32. Divide each element's mass by the mass of the compound to find the percent by mass. The answer is (3). empirical formula A formula for a compound that gives the smallest whole-number ratio of each type of atom. The percent composition can be found by dividing the mass of each component by total mass. Find the molecular mass of the entire compound. For MgS, it would be [32.0/(24.3+32.0)]*100=~56.8% mass sulfur. I will use an example though, magnesium chloride. So 50% Water ----- 16/18. #HF#. The percent composition is used to describe the percentage of each element in a compound. Use uppercase for the first character in the element and lowercase for the second character. = Percent Composition: Total mass of compound (Whole) Example 1. Question: What is the mass percentage of oxygen in Fe2O3? Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Mass percent composition of a molecule shows the amount each element in a molecule contributes to the total molecular mass. So that compounds the question from the start. 1 Approved Answer. H2SO4 . A) MnO B) MnO2 C) Mn2O3 D) Mn3O2 E) none of the above. ... 2017 in Class X Social Science by aditya23 (-2,145 points) 0 votes. 1 answer. 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. This step-by-step tutorial will show the method to determine the mass percent composition of … Kshitij G answered on June 06, 2015. 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. Percent Composition Calculator. D is your answer. 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. To find the percent composition (by mass) for each element in a compound we need to determine the molar mass for each element and for the entire compound. Disclaimer: I'm going to estimate all my masses. Which of the following compounds has the highest mass percent of "O"? #"mass percent H"="mass H"/"mass compound"xx100#, 23492 views 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. since it is just Mn and O we need the highest ration. Carbon has the highest mass percent. Think … mass of compound = molar mass. ... 2017 in Class X Social Science by aditya23 (-2,145 points) 0 votes. E) none of the above. Mass percent composition of a molecule shows the amount each element in a molecule contributes to the total molecular mass. 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. 1. 61% Upvoted. so H2O has the higher percent by mass … Each element's contribution is expressed as a percentage of the whole. This step-by-step tutorial will show the method to determine the mass percent composition of … Predict the element that will have the highest mass percent composition in each compound without doing any calculations. Divide the component's molar mass by the entire molecular mass. Each element's contribution is expressed as a percentage of the whole. 9 years ago. MgS. 118. Here, number of carbon atom is same in each compound. 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. 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: 4.4/5. Mg is the lightest of all of the 2A elements you listed. [A] HCl [B] H 2 S [C] HF [D] H 2 SO 4 [E] H 2 O . in a given compound, that element has the highest mass percentage in the compound. Feb 11 2012 12:33 PM. 13.If the empirical formula for an organic compound is CH2O, then the molecular mass of the compound could be 1)CH2 2)C2H4 3)C3H6 4)C4H8 14.A compound has an empirical formula of CH2 and a molecular mass of 56. Which compound has the highest percent com­position by mass of strontium? grendeldekt and 54 others learned from this answer. Y is known to be 60% X by mass. save. Water is H2O which is 18 g/mol. If the mass of … Login. So the answer is (3). Examples: Fe, Au, Co, Br, C, O, N, F. g H / g compound x 100% is % mass. general-chemistry; 0 Answers. Best answer. #H_2O# = Percent Composition: Total mass of compound (Whole) Example 1. Yahoo fait partie de Verizon Media. Which compound contains the highest percent by mass of hydrogen? You will now have a number between 0 and 1. For example of these compounds: Of the compounds listed in the question, water has the highest percent mass of hydrogen. What is its molecular formula? Problem: Which of these compounds contains the greatest percentage of nitrogen? Remember that molar mass of any substance is the mass of one of substance. answered Sep 18, 2016 by NetworkHinch . Which of the following compounds has the highest mass percent of chlorine? 88.89% Formic acid ----- 32/46. In the calculations below, I have rounded the masses to whole numbers. Divide the mass of hydrogen in each compound by the molar mass of the compound and multiply by 100. What are some examples of carbon compounds with the highest ratio of carbon by weight (or volume)? 3/2. Which compound contains the highest percent by mass of hydrogen? answered Sep 18, 2016 by NetworkHinch . +54. 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. In this example, I show how to find the mass percent of an element in a compound. A) MnO B) MnO2 C) Mn2O3 D) Mn3O2 E) none of the above. 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. Methyl alcohol also called methanol which is CH3OH. 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. Subtract to find the mass of oxygen in the compound. Also, the numerators are the mass of hydrogen in the compound in grams, and the denominators are the molar masses of the compounds in grams. (Determined by multiplying the subscripts of … What carbon compounds have the highest percentage of carbon by mass (or volume)? Which of the following compounds has the highest mass percent of "O"? 63) An estrogen compound with the empirical formula C12H17O2 has a molecular mass of 386.6 g/mol. Answer Save. (a) BCl3 (b) AsCl3 (c) GaCl3 (d) AlCl3 (e) PCl3. 1) HCl 2)KCl 3) LiCl 4) NaCl 2)Which compound has the smallest percent Informations sur votre appareil et sur votre connexion Internet, y compris votre adresse IP, Navigation et recherche lors de l’utilisation des sites Web et applications Verizon Media. Methyl alcohol also called methanol which is CH3OH. What is the value of n necessary to find the molecular formula? It is simply calculated using a basic formula dividing the mass of the element (or solute) by the mass of the compound (or solution). Explanation: Step 1: Data given. Which of the following has the highest mass percent of hydrogen? An empirical formula is a formula for a compound that gives the smallest whole number ratio of each type atom. Favorite Answer. ... that I might consider in its place. a) C6H3N3O7 b) CH4N2O c) LiNH2 d) Pb(N3)2 FREE Expert Solution Show answer. 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. in a given compound, that element has the highest mass percentage in the compound. 1 answer. general-chemistry; 0 Answers. Cancel units and calculate. 69.57%. 0 votes. report. Which compound has the highest percent com­position by mass of strontium? The number of moles in 12.0 g of C 2 6. Enter the molecular formula of the substance. Explanation: Divide the mass of hydrogen in each compound by the molar mass of the compound and multiply … H2O2. So methanol ----- 16/32. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. (a) 1.0 g of BeCl2 (b) 1.0 g of MgCl2 (c) 1.0 g of CaS (d) 1.0 g of SrCO3 (e) 1.0 g of BaSO4. heart. Relevance. This compound has the highest ratio of oxygen atoms to chromium atoms and therefore has the greatest mass percent of oxygen. 2/3. 2. around the world. 6 Answers. Remember that molar mass of any substance is the mass of one of substance. #HCl# Mass of oxygen = 20.00 g - 16.07 g = 3.93 g O. 1 decade ago. Relevance. (1) SrC12 (2) SrI2 (3) SrO (4) SrS. asked Sep 18, 2016 in Chemistry by Gatormerve. Recall that subscript in formula represents the number of atoms in the compound. Recall that subscript in formula represents the number of atoms in the compound. hide. PLEASE DO NOT WRITE IN THE PAPER 1) 14.6% 2)29.2% 3) 58.4% 4) 87.5% 1)What is the percent composition by mass of nitrogen in (NH4)2CO3 (gram-formula mass = 96.0 g/mol)? Use the following equation to determine the mass percent of in each compound. Of the compounds listed in the question, water has the highest percent mass of hydrogen. 1)BaS 2)CaS 3)MgS 4)SrS 15.Which compound has the greatest percent composition by mass of sulfur? 32. lulu1991. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%. Best answer. B) Mn2O3. HCl . But we have 3x more Carbon than oxygen. What is an empirical formula? asked Sep 18, 2016 in Chemistry by Gatormerve. This compound has the highest ratio of oxygen atoms to chromium atoms and therefore has the greatest mass percent of oxygen. You're looking at a percentage of oxygen by weight so you need (weight of oxygen)/(weight of compound) x 100% One oxygen is about 16 g/mol. (a) \mathrm{BCl}_{3} (b) \mathrm{As} \mathrm{Cl}_{3} (c) \mathrm{GaCl}_{3} (d) \math… 5 5. comments. Compound X 2 2 2 2. Mg is the lightest of all of the 2A elements you listed. Answer Save. Découvrez comment nous utilisons vos informations dans notre Politique relative à la vie privée et notre Politique relative aux cookies. Given : Mass of compound = 20.00 g. Mass of Zn = 16.07 g. Find: % Composition (% Zn and %O) List other known quantities. = 12.6% hydrogen by mass. you have the same 2.016 grams hydrogen here, but you have 32.0 grams oxygen in this molecule. Here, number of carbon atom is same in each compound. 1. Well, you didn't give us a compound. #H_2SO_4# Calculate the percent Y by mass of the compound X Y.. H O (molar mass = 46.1 g/mol) is calculated as follows. HF. A) MnO. You can view video lessons to learn Mass Percent Formula. 119. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%. Mass is about 32 g/mol. C) Mn3O2. 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. Determine the mass percent of in. share. Which of the following compounds has the highest mass percent of chlorine? HCOOH is also called formic acid and is 46 g/mol. For C3H6O, carbon will have the highest mass percent. Login. 2.016/32.0 X 100 = 6.3%. 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: #"% composition of element"=("MM of element")/("MM of compound")xx100# The molar mass of ammonium carbonate #("(NH"_4")"_2"CO"_3")# is #"96.086 g/mol"#. G - 16.07 g = 3.93 g O 46 g/mol have 32.0 grams oxygen in Fe2O3 notre... We have 1 mole of each type atom water has the highest mass percent composition can be found by the! 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