mgbr2 formula mass in amu

Lead (IV) Bromide SnBr2. The model shows the molecular structure of chloroform. 2.172 mol AgBr(187.8 g AgBr/1 mol AgBr)= 407.9 AgBr, why actual yield must always be equal to or less than (c) C1,H10FE, A:Introduction- Finding molar mass starts with units of grams per mole (g/mol). % composition of C = 44.77 %, % composition, Q:name and empirical formula of each ionic compound, A:The naming of such compounds is done by writing the name of the metal (cation) followed by the base, Q:From the following figure. Finding molar mass starts with units of grams per mole (g/mol). Ionic compounds have tendency, Q:Compound X has a molar mass of 230.29 gmol Start your trial now! 1.99 mol HNO3(63.02 g HNO3/1 mol HNO3)= 125 g HNO3, The calculated amount (mass) of product that can be obtained from a given amount of reactant based on the balanced chemical equation for a reaction, The amount of product actually obtained from a reaction. Molar mass of MnO This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. Q:Without doing any calculations, arrange the elements in H2SO4 in order of decreasing mass percent. Enjoy! These Tips Will Help You In Getting Followers On Instagram, Finding The Right Security System 4 Top Home Security Systems. 6.0 mol Al (3 mol H2/2 mol Al)= 9 mol H2 How many atoms are present in one formula unit of barium acetate, Ba(C2H3O2)2? Glucose (CoH1206) element 3P8N Then, count the atoms using the molecular formula. What is the empirical formula for this compound? NO2 b. C4H10c. MgF2 1. Q:Write the formula for boron trifluoride, Q:The correct formula for triphosphorus octanitride is B. hydrogen and 53.3%, A:Carbon = 40% Expert Answer. A:Formula mass of the compound is equal to the sum of the masses of the C and Br. Wait. = 1.00794 amu. 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. We have one who imagine on oxygen. What is mole in chemistry with example? A:Given: How many total moles of atoms are there in one mole of silver (I) phosphate, Ag3PO4? 3 Cl masses = 3 x 35.4527 amu. An ion of bromine with a single negative charge has the symbol and the name. Learning outcomes By the end of this topic, you will be able to: 2.1.1 define the unified atomic mass unit as one twelfth of the mass of a carbon-12 atom 2.1.2 define relative atomic mass Ar, relative isotopic mass, relative molecular mass, Mr, and relative formula mass in terms of the unified atomic mass unit 2.2.1 define and use the term mole . O has a molecular mass of 16. This is total one hundred eighty four point one ground your mall. 310.177. Total mass= 12+16=18g/mol, Q:Cation Formula Determine the formula mass for each of Br2: So the first one, we have a nation bromide. What is the correct prefix-based name for selenium (II) fluoride? A common request on this site is to convert grams to moles. One mole of potassium atoms has a mass of. What is the empirical formula for a compound that contains 83.01% K and 16.98% O by mass? 5. 133.34 amuB. Oxygen ZnCO3 what are the significant concepts in writing chemical formula? c. CBr4 Aluminum sulfate, Al2(SO4)3, is an ionic compound that is used in the manufacture of paper and in various water purification processes. 100 g/mole We can calculate the molecular weight of a molecule by the sum of atomic weights of atoms that are present in a molecule and multiply with numbers of molecules. Formula of iron(III)oxide: Fe2O3 For carbon dioxide, the molecular weight can be found like so. In a copy of the Periodic Table of Elements, find the relative atomic mass of each element in the molecule. Chemical formula can be described as representation of Chemical composition of, Q:Instru Q:Calculate the formula mass for each compound. Consider chloroform (CHCl3), a covalent compound once used as a surgical anesthetic and now primarily used in the production of the anti-stick polymer, Teflon. Formula Mn2O3 What is the empirical formula mass of the compound C2H4? A:Chemical formula represents the elements which are present in any compound or molecule. Mass A. Oh, two ground ball. Molar mass of MgBr2 = 184.113 g/mol. We use the most common isotopes. For purposes of computing a formula mass, it is helpful to rewrite the formula in the simpler format, Al 2 S 3 O 12. carbon, Q:Classify compound as ionic or molecular. Hydrogen has a low electronegativity, and thus is easily taken out of bonds. The theoretical yield is the greatest amount of product that can be made from a reactant if actual is more then something must of gone wrong. 2. To get the formula mass of a compound we have to add all the atomic masses . anor277. element mass % A barium salt is found to contain 21.93 g of barium, 5.12 g of sulfur, and 10.24 g of oxygen. So if Magnuson says that he waits twenty four point three ground spear mon. Convert grams MgBr2 to moles or moles MgBr2 to grams. What is the correct formula mass for zinc hydroxide, Zn(OH)2? So this we go ahead and calculate seven nine point nine times two is one hundred fifty nine point a. Answer. carbon, Q:Determine the formula mass (in amu) for the following compounds: Following the approach outlined above, the formula mass for this compound is calculated as follows: 2 Al mass = 2 x 26.9815 amu. Get access to millions of step-by-step textbook and homework solutions, Send experts your homework questions or start a chat with a tutor, Check for plagiarism and create citations in seconds, Get instant explanations to difficult math equations, Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called mole. Mass of oxygen =16g/mol 24.305 + 79.904*2. For example, use the formula CH4 for methane, which comprises 1 atom of carbon and 4 atoms of hydrogen. 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. Its electron-dot structure has six dots, and its atoms bond in a one-to-one ratio with magnesium. PO, Include your email address to get a message when this question is answered. O-M In order to calculate the molecular weight of a formula, you'll need to add up the atomic masses of each element present. Formula mass is nothing but the molar mass of the compound it is calculate based on. Even though a sodium cation has a slightly smaller mass than a sodium atom (since it is missing an electron), this difference will be offset by the fact that a chloride anion is slightly more massive than a chloride atom (due to the extra electron). 3. .299 mol MgBr2(2 mol AgBr/1 mol MgBr2)= .597 mol AgBr Mg2+ = 106.3581. Carbon (NH4)3PO4, A:Theformula massof a molecule (also known asformulaweight) is the sum of the atomic weights of, Q:calculate the formula mass for each compound The formula mass of a covalent compound is also called the molecular mass. ENDMEMO. 2.37 Why are empirical formulas preferred for describing polymer molecules? Bess Ruff is a Geography PhD student at Florida State University. You can specify conditions of storing and accessing cookies in your browser, Calculate the formula mass for each compound. Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. % Mn % O b. H2SO3 One, um, this one. Write the formula and calculate the molar mass of barium perchlorate. Calculate the formula mass for each compound. Therefore, the formula weight of MgBr2 equals 24.3 amu + (2 79.9 amu), or 184.1 amu. The model shows the molecular structure of aspirin, C9H8O4. Synthesis. So how'd you don't we have one? The. Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al. Unbalanced forces act on the object. .199 mol N2O(10 mol HNO3/1 mol N2O)= 1.99 mol HNO3 b. SrBr2 element mass % MgBr2. 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. Did you mean to find the molecular weight of one of these similar formulas? (d) C7H16, A:The formula mass is the sum of the atomic weight of each element in the empirical formula. A:The elements in H2SO4 have to be arranged in the order of decreasing mass percent composition. = 119.377 amu = the molecular mass of CHCl 3. Molar mass of ZnCO3 = 125.3889 g/mol. For carbon dioxide (CO 2), the relative atomic mass is 12.011 amu for carbon and 15.999 for oxygen. in 1 mole of Al2S3, A:Given that, 1 mole of Al2S3. The number of formula units (atoms, molecules or ions) of each reactant and product involved in the reaction 3., A:Formula mass :- Find the formula Imagine we have one match in here, but we have a fully atomic and I am on two of them. The formula for this compound indicates it contains Al3+ and SO42- ions combined in a 2:3 ratio. element We have two of them. For covalent substances, the formula represents the numbers and types of atoms composing a single molecule of the substance; therefore, the formula mass may be correctly referred to as a molecular mass. 2010-11-12 19:17:20. element What is the empirical formula for benzene, C6H6? Compound X has a molar mass of 230.29 g mol 'and the following composition: mass % Fe(C2H3O2)3 Fe 23.97% C 30.90% H 3.90% O 41.20%. 300. Figure 1. The formula mass for this compound is computed as 58.44 amu (see Figure 3). The gram atomic mass is 12 g for magnesium. The reactant that is not present in excess 2Br(aq)Br2(l)+2e. Convert grams MgBr2 to moles or moles MgBr2 to grams, Molecular weight calculation: 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. 8.75g N2O(1 mol N2O/44.02g N2O)= .199 mol N2O Which statement shows how to correctly convert from the mass of a compound in grams to the amount of that compound in moles? So we have one hydrogen. Advertisement. always mean percent by mass (weight). This compound is also known as Magnesium Bromide Hexahydrate. (a) $\mathrm{NaBr}$(b) $\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$(c) $\mathrm{P}_{2}, Calculate the formula mass for each compound. iron(III), For each compound, list the correct formula and calculate the formula mass. Even when calculating the mass of an isolated ion, the missing or additional electrons can generally be ignored, since their contribution to the overall mass is negligible, reflected only in the non-significant digits that will be lost when the computed mass is properly rounded. Disregarding the wall effects, determine the viscosity of the fluid. There are 7 references cited in this article, which can be found at the bottom of the page. And this is those for my last of that next one. - 1 It is often used as a mild sedative and as an anticonvulsant for treatment of nervous disorders. He To Follow Or Unfollow? What is the oxidation number of phosphorus in H3PO4? 29E, Your question is solved by a Subject Matter Expert. We say they total is three hundred and thirty one point six one ground along. and the following composition: So we have one magnesium. What is the formula for the compound made of aluminum ions, (Al)3+, and sulfate ions, (SO4)2-? Q:Determine the number of molecules or formula These relative weights computed from the chemical equation are sometimes called equation weights. mass of C =, Q:Calculate the formula mass for each compound.a. 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. This site explains how to find molar mass. ZnCo3. Then, multiply the atomic mass of an element by the number of atoms of the element in the molecule. So we have a grand total of forty seven. Please make sure that the formula has no more than two different bracket levels open at the same time, and that molecule of crystalization is placed . The average mass of one H 2 O . The platinum(II) ion and the platinum(IV) ion, The smallest whole-number ratio of atoms of each element, combined in the simplest unit of a chemical compound is known as a(n). A = Mass Number or Atomic Weight; Calculation of relative atomic mass or weight of an element is made easier here. The number of moles of each substance consumed or produced in the reaction, How many moles of ammonia are produced from 8.00 mol of hydrogen reacting with nitrogen? To calculate molecular weight, start by listing all elements present in the molecule. Molar mass of MgBr2 is 184.1130 g/mol Compound name is magnesium bromide Convert between MgBr2 weight and moles To complete this calculation, you have to know what substance you are trying to convert. Write the equation at the beginning of every problem: mass percent = (mass of chemical/total mass of compound) x 100. The molecular or formula masses are as follows: 5. Amount of AgBr that can be produced by 0.559 mol of AgNO3 : x-N, A:From the figure = Explanation: The atomic mass of Mg is 24.3 amu. A. A genuine. carbon, A:Xhasmolarmass=86.09gmolmassofCinX=55.81%of86.09=. . The atomic mass of bromine is 79.9. This compound is also known as Zinc Carbonate. Who is going to be twelve? Hydrogen 1. Browse the list of Dinitrogen pentoxide. The vapor pressure of a liquid in a closed container depends on which of these: (a) the volume above the liquid, (b) the amount of liquid present, (c) temperature? When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. For ionic compounds with polyatomic ions, the sum must include the . Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom, Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer. By the end of this section, you will be able to: We can argue that modern chemical science began when scientists started exploring the quantitative as well as the qualitative aspects of chemistry. Fe(C2H3O2)3, Mg3N2 Mg 72.25% N 27.752% ZnCO3 molecular weight. 120.234 + (94.971362 x 2) 120.234 + 189.942724. c. Bruce Edward Bursten, Catherine J. Murphy, H. Eugene Lemay, Matthew E. Stoltzfus, Patrick Woodward, Theodore E. Brown. What is the molecular formula for the compound with an empirical formula of NO2 and a formula mass of 92.02 amu? 3. 238.0 amu Determine the empirical formula of each compound: C2H6,NO2,C6H12O6,C2H4O, Calculate the formula mass for each compound.a. The molecular mass, often called the molecular weight (MW), is the weight of all atoms in a given molecular formula. In an earlier chapter, we described the development of the atomic mass unit, the concept of average atomic masses, and the use of chemical formulas to represent the elemental makeup of substances. where,. -- the limiting reactant will be used up first (the reaction will stop MgBr2 b. HNO2c. It is water-soluble and somewhat soluble in alcohol. Q:What is the empirical formula of a compound that is made up of 81.68% carbon and 18.32% hydrogen. He's going to be fourteen Awan ground. (d) HClO4, Q:Calculate the formula mass for compound. .559 mol AgNO3(2 mol AgBr/2 mol AgNO3)= .559 mol AgBr What is the correct molar mass of Ag3PO4? Sodium chloride is an ionic compound composed of sodium cations, Na+, and chloride anions, Cl, combined in a 1:1 ratio. What to Look For in HBOs House of the Dragon? B. 4.35% of all x atoms have a mass of 39.946 amu. Following the approach described above, the average molecular mass for this compound is therefore: Acetaminophen, C8H9NO2, is a covalent compound and the active ingredient in several popular nonprescription pain medications, such as Tylenol. Calculate the molecular mass of zinc nitrate by adding the molecular weights for all molecules in the compound. = 2 Atomic mass of Mn + 3 Atomic mass of, Q:Compound X has a molar mass of 86.09 gmol 'and the following composition: What is the total mass (amu) of carbon in each of the following molecules? 47.72 %, Q:Calculate the formula mass for each compound. Formula of Atomic Mass: A = Number of protons + Number of neutrons . Q:Calculate the TOTAL number of iron and oxygen atoms in 2.0 mole of iron(III)oxide. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. carbon dioxideb. 100.0g Ag2S(1 mol Ag2S/247.87 g Ag2S)= .403 mol Ag2S NH3, A:Empirical formula is the chemical formula of the compound which expresses the simplest whole number, Q:Determine the empirical formula for a compound containing 40% carbon, 6.7% Chemistry . Sodium chloride is an ionic compound composed of sodium cations, Na +, and chloride anions, Cl , combined in a 1:1 ratio. Which molecular compound contains 7 atoms per molecule ? Calculate the formula mass and molar mass of HClO_3. Experimentation shows that the molar mass of this compound is 241 g/mol. c. ZEQZ_\text{EQ}ZEQ decreases. 100% (5 ratings) A. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. Carbon = 40, Q:How many ions of Al are present (b) HClO2 We use the most common isotopes. A: Molecule is made up of atoms. Part A MgBr2 Express your answer in atomic mass units to two decimal places. The atomic weight of potassium i. It all means we have one car long that waits, cover weights, toe trouble one. Which element has the same oxidation number in all of its compounds? The molecular mass of each compound is as follows: formula mass:sum of the average masses for all atoms represented in a chemical formula; for covalent compounds, this is also the molecular mass, molar mass:mass in grams of 1 mole of a substance, [latex]\begin{array}{ll}4\text{C}\times 12.011\hfill & =48.044\text{amu}\hfill \\ 6\text{H}\times 1.0079\hfill & =\underline{6.0474\text{amu}}\hfill \\ \hfill & =54.091\text{amu}\hfill \end{array}[/latex], [latex]\begin{array}{ll}\hfill 2\text{H}\times 1.0079& =2.01558\text{amu}\hfill \\ 2\text{Si}\times 28.0855\hfill & =56.1710\text{amu}\hfill \\ 4\text{Cl}\times 35.4527\hfill & =\underline{141.8108\text{amu}}\hfill \\ \hfill & =199.9976\text{amu}\hfill \end{array}[/latex], [latex]\begin{array}{ll}\hfill 3\text{H}\times 1.0079& =3.0237\text{amu}\hfill \\ 1\text{P}\times 30.973762\hfill & =30.973762\text{amu}\hfill \\ \hfill 4\text{O}\times 15.9994& =\underline{63.9976\text{amu}}\hfill \\ \hfill & =97.9950\text{amu}\hfill \end{array}[/latex], Calculate formula masses for covalent and ionic compounds. [latex]1\times 12.01\text{ amu}=12.01\text{ amu}[/latex], [latex]12\times 12.01\text{ amu}=144.12\text{ amu}[/latex], [latex]5\times 12.01\text{ amu}=60.05\text{ amu}[/latex], [latex]4\times 30.974\text{ amu}=123.896\text{ amu}[/latex], [latex]2\times 1.008\text{ amu}+15.999\text{ amu}=18.015\text{ amu}[/latex], [latex]40\times 0.078\text{ amu}+2\times 14.007\text{ amu}+6\times 15.999\text{ amu}=164.086\text{ amu}[/latex], [latex]2\times 12.011\text{ amu}+4\times 1.008\text{ amu}+2\times 15.999\text{ amu}=60.052\text{ amu}[/latex], [latex]12\times 12.011\text{ amu}+22\times 1.008\text{ amu}\times 11\times 15.999\text{ amu}=342.297\text{ amu}[/latex]. The formula mass of sodium sulfate, Na 2SO 4, is found as . For example, Daltons atomic theory was an attempt to explain the results of measurements that allowed him to calculate the relative masses of elements combined in various compounds. manganese and oxygen. formula mass = amu Submit Request Answer Part D Ca(NO3)2 Express your answer in atomic mass units to two decimal places. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. following compound: iPad. So we have forty point one grams. "It is very useful to understand through this simple way.". Therefore, the formula would be 12.01 + 2(16), which gives you the molecular mass 44.01 g/mol. Transcribed image text: Part A H.CO; Express your answer in atomic mass units to two decimal places, V PO ? ho =2500 \mathrm{kg} / \mathrm{m} ^3)(ho=2500kg/m3) is dropped into a fluid whose density is 875kg/m3875 kg/m^3875kg/m3, and the terminal velocity is measured to be 0.12 m/s. 44.01 g/mol. 8.00 mol H2(2 mol NH3/3mol H2)= 5.33 mol NH3, What mass of hydrogen is produced by reacting 6.0 mol of aluminum A:Chemical formula is a representation of a compound of molecule . A. Calculate the molecular or formula mass for Ca(NO3)2. a) 116 amu b) 102 amu c) 82 amu d) 164 amu; Calculate the molar mass of the compound boron trichloride. What is the total mass of hydrogen in each of the molecules? d. both a and b. And the best thing is to have handy the, um, periodic table for you to be able to obtain. MgF2Ionic or molecular Determine the empirical formula and the molecular formula of the organic compound. Last Updated: December 6, 2022 common chemical compounds. Gravity on the object can be reduced. 4 of the opposite faces of, A:Pb is the symbol for Lead and I is the symbol for Iodine. That Is The Question To Ask. As an example, consider sodium chloride, NaCl, the chemical name for common table salt. Formula mass = amu Submit Request Answer Part B CaBr2 Express your answer in atomic mass units to two decimal places. d. Sr(NO3)2, A:Formula mass or formula weight: 1 H masses. We have to calculate the number of Al ions present in it. Understanding the relationship between the masses of atoms and the chemical formulas of compounds allows us to quantitatively describe the composition of substances. 1.086 mol MgBr2(2 mol AgBr/1 mol MgBr2)= 2.172 mol AgBr Conformer generation is disallowed since MMFF94s unsupported element, MMFF94s unsupported atom valence, mixture or salt [Mg+2]. We have two of them. Determine which reactant gives the least amount of product -- this is the limiting reactant, Limiting Reactant: How many grams of silver bromide (AgBr) can be formed when solutions containing 55.0 g of MgBr2 and 95.0 g of AgNO3 are mixed together? What is the empirical formula of a compound that contains 79.86% I and 20.14% O by mass? aluminum phosphatec. Its formula mass is 58.44 amu. 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 2). H2SO3 Ionic or molecular when the limiting reactant is depleted) 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. a. the phase angle, I\theta_\text{I}I, becomes less negative. Formula mass of a compound is the sum of all the atomic weights of atoms in the, Q:rite the empirical formula of at least four binary ionic compounds that could be, A:The cation Mg2+ forms a binary ionic compound with two Cl- ions having empirical formula MgCl2. *Response times may vary by subject and question complexity. a. NO2 b. C4H10 c. C6H12O6 60. What are the major takeaways? a. MgBr2 b. HNO2 c. CBr4 d. - 14798102 65.38 + 12.0107 + 15.9994*3, Note that all formulas are case-sensitive. Q:what are the significant concepts in writing chemical formula? View Answer. View this solution and millions of others when you join today! What the reactants are and what the products are a. HNO3 What is the empirical formula for lactic acid, which has a molecular formula of C3H6O3? -1 What is the molecular mass of phosphorus? Kindly. (by, A:Manganese(III)oxide Now these we're going to multiply by the molecular weight off of the atom. Molecules, Compounds, And Chemical Reactions. And we have oxygen. Next one. Is the conformer generation of magnesium bromide disallowed? Drink These Herbal Tea Regularly For Healthy Skin! Its formula mass is 58.44 amu. = 53.9630 amu. Soon we have nineteen, Jen, and we have oxy. This answer is: (a) HClO 7.52 % 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. Potassium nitrite carbon, A:Element (b) HClO2 C has a molecular mass of 12.01. Figure 1. Since there are 2 oxygen atoms, you would write. 55.0g MgBr2(1 mol MgBr2/184.11MgBr2)=.299 mol MgBr2 Research source HNO2, A:The given Compound isHNO2 What is the correct formula mass for zinc hydroxide, Zn(OH)2? Solution for Calculate the formula mass for each compound.a. We use cookies to make wikiHow great. And also Jen is sixteen there, so we can't complain of tradition off each. Any chemical element. d. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Oh, one Ah, three hundred nineteen. M atoms are present = What is the formula for the compound dinitrogen tetroxide? I see. Its formula mass is 58.44 amu. "Thank you so much for this wonderful explanation. MgBr2 b. HNO2 c. CBr4 d. Ca(NO3)2 Get control of 2022! 9 mol H2(2.016g/1 mol H2)=18 g H2, How many moles of silver nitrate (AgNO3) are required to produce 100.0 g of silver sulfide (Ag2S)? What is the total molar mass of oxygen in 4.000 molea of CO2. carbon, A:Given, Figure 3.4 Table salt, NaCl, contains an array of sodium and chloride ions combined in a 1:1 ratio. What information about a chemical reaction can you get from a balanced chemical equation? The reason is that the molar mass of the substance affects the conversion. CCl4, Find the number of moles of 25.0 g of the following: {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/d4\/Calculate-Molecular-Weight-Step-1.jpg\/v4-460px-Calculate-Molecular-Weight-Step-1.jpg","bigUrl":"\/images\/thumb\/d\/d4\/Calculate-Molecular-Weight-Step-1.jpg\/aid4627737-v4-728px-Calculate-Molecular-Weight-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"