the mass in grams of a mole of any pure substance atomic mass the mass in amus of an atom of an element Avogadro's number the number of representative particles in a mole of a substance mole (mol) 6.02 x 10^23 representative particles of a substance empirical formula the formula that gives the lowest whole-number ratio of the elements in a compound . The precipitate formed in a double-replacement reaction can be identified using table of solubility. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The number of moles of a species is given by the expression (1) in which n represents the number of moles, m represents the given mass and M represents the molar mass. Most questions answered within 4 hours. When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. Experts are tested by Chegg as specialists in their subject area. Chemistry High School answered expert verified What is the mass, in grams, of a molecule of aspirin (C9H8O4)? (d) What is the molar mass of a particular compound if 0.099 mol It is equal to 6.023 1023 mol-. You do the numbers. Molecular weight calculation: 12.0107*9 + 1.00794*8 + 15.9994*4. These relative weights computed from the chemical equation are sometimes called equation weights. Solution. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. Molar mass of Aspirin (or Acetylsalicylic acid or C9H8O4) is 180.159 g/mol. weighs 5.10 g. This is how to calculate molar mass average molecular weight , which is based on isotropically weighted averages. This gives a molar mass of 126.737 g/mol. b) A one-gram sample of aspirin contains 85.2% by mass of C9H8O4. Chemical equation with the same number of atoms of each element on both sides of the equation, (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected, A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products. Expert Answer Aspirin = C9H8O4 We determine the molar mass of acetylsalicylic acid: 1 mol C9H8O4 = 12*9 + 1*8 + 16*4 = 180 g i) We convert the 325 mg of aspirin into grams: 1 g/1000 mg * 325 mg = 0.325 g We use the molar mass to determine the number of aspirin m View the full answer This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. Jay is an educator and has helped more than 100,000 students in their studies by providing simple and easy explanations on different science-related topics. Now in Aspirin C9H8O4 , there are 9 Carbon atoms, 8 Hydrogen atoms and 4 Oxygen atoms. The units of mass are typically grams. But all these units (i.e g/mol, grams/mole and g/mole) are the same. What is the mass of 0.40 mol of aspirin? If we have 12.01 grams of carbon, we will have one mole of carbon atoms, or 6.02x1023 carbon atoms. The number of particles in exactly one mole of a pure substance, a chemical formula showing the ratio of elements in a compound rather than the total number of atoms, atomic mass of an element expressed in grams, the mass of one mole of an ionic compound, the mass in grams of a mole of molecular units; a value numerically equivalent to the average molecular mass expressed in grams, the volume occupied by 1 mole of a gas at standard temperature and pressure (STP); 22.4 L, (physics and chemistry) the simplest structural unit of an element or compound, The percent by mass of each element in a compound, the smallest unit into which a substance can be broken down without a change in composition, usually atoms, molecules, or ions.
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