Next, you can probably find the mass of an electron which you can also convert to kg. Everything has mass and volume, and therefore density. (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 expressed in g/mol. Note: Learn more about the density here. 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. About Nitrogen gas; 1 cubic meter of Nitrogen gas weighs 1.251 kilograms [kg] 1 cubic inch of Nitrogen gas weighs 0.000723124 ounce [oz] Nitrogen gas weighs 0.001251 gram per cubic centimeter or 1.251 kilogram per cubic meter, i.e. But what is the density of an atom of N? Calculate the number of atoms in 39.4 g gold. Without chemical processes involving several of the atmospheric gases, life could not exist. What is the mass of a single nitrogen atom in grams? Then, convert that to kg. Weights of atoms and isotopes are from NIST article. Then, subtract the mass of the electron for the mass of the atom to get the mass of a single sodium ion: So, 22.98977 g/mol / 6.022045X10^23 = 3.817602 X 10^-23 g/atom X 1 kg/1000 g = 3.817602 X 10^-26 kg. What you do is find the molar mass of N from periodic table = 14.01g. Nitrogen is a gas that has the atomic number 7 and the chemical symbol N. There are 7 neutrons, 7 protons and 7 electrons in a nitrogen atom. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). Mass of nitrogen in = 14 g/mol. For 2: Mass of nitrogen will be 350 grams. Explanation: Conversion factor: 1 kg = 1000 g For 1: Molar mass of = 101.1 g/mol. Finding molar mass starts with units of grams per mole (g/mol). In the case of Nitrogen , density is 0.0012506 g/cm³. The question also states that the molar mass of nitrogen (N2) is 28.0 g/mole. A nitrogen atom has seven electrons. For 2: Neutron Number and Mass Number of Nitrogen. 1 answer. As, in 101.1 g/mol of contains 14 g/mol of nitrogen.. So, 1000 grams of will contain = of nitrogen.. Answer: For 1: Mass of nitrogen will be 138.47 grams. The atomic mass of nitrogen is 14.00674 atomic mass units. The atmosphere is mostly made up of oxygen and nitrogen in their diatomic forms. So it is expected that the smallest piece of matter, like an atom of Nitrogen has it too. Hence, Mass of nitrogen in will be 138.47 grams. I would like if you could show the work so I … 2 moles N X 14.01 grams N-----1 Mole N. Then moles of N cancel and you are left with 28.02 (2X 14.01) But if the question in asking for N2 which is the most common form of Nitrogen because it is diatomic then you would use the same formula except you would multiply 2 X 28.02. 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