- Definitions of molecular mass, molecular weight, molar mass and molar weight. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (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 ...
- C6H6(l) + Br2(l) = C6H5BR +HBr You were on the right track. The first step is to convert grams to moles So you have 18.3 grams of Benzene and 3.21 grams of Bromine, so you would determine the molar mass of each compound.
- Aug 17, 2014 · I. The molar mass of CaCO 3 is 100.1 g mol−1. II. 50 g of CaCO 3 contains 9 ×1023 oxygen atoms. III. A 200 g sample of CaCO 3 contains 2 moles of CaCO 3 a. I only b. II only c. III only d. I and III only e. I, II, and III Practice Test Ch 3 Stoichiometry Name_____Per_____
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