20g. The atomic mass is carried by the atomic nucleus, which occupies only about 10 -12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. Indentify each substance as ammonia, sulfur dioxide, chlorine, nitrogen, or methane. 1 gram molecule of H 2 = 2.0 g = 1 mole of hydrogen molecule. Formula mass . O 2 is a diatomic molecule. A 0.474 gram sample of β-galactosidase is dissolved in water to make 0.144 L of solution, and the osmotic pressure of the solution at 25, 1) 1.12 dm3 of a gas at STP is found to weigh 3.55g.Find molecular weight and vapour density of gas 2)5.6 dm3 of a gas at STP weighs 11g Find out its relative molecular mass & vapour density, I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. What are the empirical and molecular formulas of the compound? Was she correct? Nicotine,a poisonous compound found in tobacco leaves,is 74% carbon,8,65% hydrogen and 17,35% nitrogen (a)calculate the empirical formula of nicotine (b)what is the molecular formula of nicotine if it has a molar mass of 165 g.mol^-1, Please check my answers for the following questions. 8.0 g B. Answered What is the mass of 1 gram of nitrogen molecule … Nicotine,a poisonous compound found in tobacco leaves,is 74% carbon,8,65% hydrogen and 17,35% nitrogen (a)calculate the empirical formula of nicotine (b)what is the molecular formula of nicotine if it has a molar mass of 165, Please check my answers for the following questions. When 34.5 L ammonia and 39.5 L oxygen gas at STP burn, nitrogen monoxide and water are produced. Multiply the subscript after each element symbol (the number of atoms) by that element's atomic mass. for the, an empty container has a mass of 658.57g. For an element, its molar mass is equal to its gram atomic mass. Gram molecular mass. How do you calculate the mass of a single atom or molecule? Elemental analysis of a compound, once used as a pesticide, was found to be 74.2% carbon, 8.64% hydrogen, and 17.2% nitrogen. The mass of an oxygen atom = 16 amu. What are the empirical and molecular formulas of the compound? a sample of compound C,H,N and O with a mass of 0.6216 was found to contain 0.1735g C,0.01455g H,0.2024g N.Its molecular mass 129.calculate its epirical and molecular formulas. What volume of ammonia at 7.0 atm and 235C would you get from 333g of nitrogen reactin with enough mass of hydrogen?k calculate the density of hydrogen at STP? Ask your question. Some of the data obtained are given below Percent by weight Molecular Compound of Element Q Weight X, A compound is found to be 51.39% carbon, 8.64% hydrogen, and 39.97% nitrogen. If not, how. Download the solution in … #7 is the one I am really having a problem with, but here is. Actual mass of a molecule is obtained by driving the molar mass by Avogadro’s number whereas gram molecular mass represent the molecular mass excepted in grams, i.e., it is the mass of 1 mole of molecular, i.e., Avogadro’s number of molecules. What is the gram-formula mass of Fe(NO3)3? chemistry. Find the empirical Formula of a compound that is 30.4% nitrogen by mass, and consists of only nitrogen and oxygen. Calculate the energy change when 45g of Octane burn. So, the molar mass of ammonium sulfate is 132.14 g/mol and the molar mass of nitrogen is 14.007 g/mol. Write an equation for the reaction B. What is its significance? 14 g of nitrogen is equal to 1 gram-atom of nitrogen. The mass in … That is 2.3 * ten to the power -ve 24 g Computing Molecular Mass for a Covalent Compound Ibuprofen, C 13 H 18 O 2, is a covalent compound and the active ingredient in several popular nonprescription pain medications, such as Advil and Motrin.What is the molecular mass (amu) for this compound? A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. Log in. Hydrogen molecule (H2 - Molecular mass), molar mass Type the number of Hydrogen molecule (H2) you want to convert in the text box, to see the results in the table.