while, molar mass is mass of one mole of a substance. If you have 6.02*10^23 feathers and 6.02*10^23 bricks, you have 1 mole of each, but the bricks have a lot more mass. The amount of molecules of any substance to make 1 mole is constant. The molar mass is the amount of mass that 1 mole of that substance possesses. In summary of the atomic mass vs molar mass comparison, we have that the latter is a measure of the mass of a substance with regards to the Avogadro’s number (6.022 X 10 23) … This mass is of one mole per one element. As given to you, the molecular mass, #M_r#, is most likely the relative molecular mass, sometimes called molecular weight, which is defined as molecular mass divided by #1/12"th"# of the mass of a single, unbound carbon-12 atom. molar mass is in grams. Yeah, You have read it correct. However, due to differing atomic masses, different molecules will have different molar masses. Key Difference – Formula Unit Mass vs Molecular Mass. Rep:? Molar mass is the same as molecular weight. The formula mass and molecular mass of water (H 2 O) are one and the same, while the formula and molecular mass of glucose are different from each other. #"relative molecular mass" = "molecular mass"/"1 u"# For water, the relative molecular mass is The molar mass of a substance is numerically equal to the atomic mass or the molecular mass of the substance in u and is always measured in grams. Molecular Mass: Molecular mass of a molecule is the mass of a mole of … It is a unitless quantity,being the ratio of two masses. one mole is equal to Avogadro's number (#N_A=6.022xx10^23#) atoms or molecules. Avogadro’s number, 6.022 x 1023 is often used to relate the number of atoms, molecules and other units that a molar mass is equal to. Difference between Molar Mass and Molecular Mass and Atomic Mass?? The atomic mass of a single H atom is 1.00amu . We will use u, kg and g as the units of mass. The molecular mass of a molecule is also called the molar mass. It is different from empirical formula as it only shows the ratio between atoms in a substance. Both molar mass and atomic mass are related to the subject of chemistry — the names of each mass help key in the difference between them. Difference 1. The tiny constant mass of #1/12th# part of the mass of #"_6^12C# atom is also considered as unit of mass … It is equal in NUMBER to the molecular mass, but it differs in units. Difference between Molar mass and Molecular mass. - the answers to estudyassistant.com Molecular mass, equivalent mass and formula mass tells the same thing i.e mass of element, compound or ion etc., but these three are different. Molecular mass is the computed mass from a molecular formula. Find your group chat here >> start new discussion reply. GRAM MOLECULAR MASS AND MOLAR MASS OF A MOLECULE ARE SAME gram molecular mass is molecular mass of a substance in grams i.e mass of one mole of molecules. molar mass is simply the mass of 1 mol of entities that is expressed in grams, whereas molecular mass is the mass of all the atoms in it, that is expressed in terms of amu (atomic mass unit) E.g :- molecular mass of O2 is 32 amu molar mass of O2 will be 32amu * No 1 amu =1.6*10^-24 therefore, molar mass = 32 * 1.6 *10^-24 * 6.023 * 10^23 = 32grams An example of this will be given later. (atomic mass unit). This is because the mass is given per one mole. In other words, the molar mass is the amount of atoms, molecules in one mole of a substance. #1 Report Thread starter … Molecular mass : Molecular mass refers to the mass of a molecule. However, the main difference is that molecular weight only describes the weight of the molecules over the elements. however, the molar mass of sodium is 23g/mol. Page 1 of 1. Aug 14, 2018 - Chemists frequently measure substances by using molar mass and molecular mass. This means that one mole of carbon dioxide molecules has a mass of 44 g. The molar mass of carbon dioxide will thus be 44 g/mol. MOLAR MASS :- Refers to mass of a mole of a substance; Also known as molecular weight; SI unit is g/mol to use in higher calculations; It is defined as the mass of Avogadro number of atoms/molecules or compounds; Measurement given to compounds, atoms or molecules; Less accurate than molecular mass; Example: Mass of 1 … This technical article explains the confusion resulting from molecular weight and the nominal mass, monoisotopic mass and average molar mass. It is calculated as the sum of the mass of each constituent atom multiplied by the number of atoms of that element in the molecular formula. Molar mass of a molecular compound = molecular mass in grams/ 1 mole compound. The molecular mass is a relative mass of a molecule of a substance ( a compound or an element )measured by the ratio of the mass of one molecule of the substance to the mass of #1/12th# part of #""_6^12C# atom. terminology  Share. However, a molar mass is the mass of one mole atoms or molecules and is given in grams. The molar mass, on the other hand is the mass of one mole (or 6.023 X 10 23) particles of that substance. It is equal to the molecular mass or atomic mass taken in grams. That atom can be at rest, or it can have a specific amount of protons and neutrons. The exact mass of atoms are integer multiples (since neutrons and protons, which are the mass "stuff", cannot be fractions) and when you see the atomic mass …