In comparing a balloon containing 25 grams of helium to a balloon containing 25 grams of neon, which one of the following statements is TRUE? Molar mass of MgCl2 = 95.211 g/mol (Mg: 24.3050 g/mol , Cl: 35.453 g/mol *2) mass of 3.80 moles of magnesium chloride = 3.8 mol * 95.211 g/mol = 361.8018 g d) all of the above. The molar mass of an element is its atomic weight (relative atomic mass) on the periodic table in g/mol. One mole is 6.02x10^23 molecules of that compound. The mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon. A) the mass of half a mole B) the mass of one mole C) the mass of one molecule D) the mass of one atom B) the mass of one mole A sample of calcium that contains Avogadro's number of atoms has a mass of ________. So magnesium nitride is an ionic compound made up of magnesium cations ##Mg^(2+)## and nitride anions ##N^(3-)##. A gas mixture contains 1.05 mol of O2 and 5.21 mol of N2. Whatis the total pressure of the mixture?2. b) molecules in one mole of O 2. c) marbles in one mole of marbles. its molar mass. The atomic weight of magnesium is 24.305, therefore its molar mass is #"24.305 g/mol… The formula for magnesium oxide is MgO. 1xxMg + 2xxN + 6xxO, you would arrive at the formula mass of Mg(NO_3)_2? How many molecules of … The number of atoms in 9.0 g of aluminum is the same as the number of atoms in a) 8.1 g of magnesium b) 9.0 g of magnesium c) 12.1 g of magnesium d) 18.0 g of magnesium 14. A single molecule of a certain compound has a mass of 3.4x10-22 g. What is the mass of 7.50 moles of magnesium chloride, MgCl2? Dalton's Law of Partial Pressure1. Molar mass is the mass of one mole of a compound. Relevant information: Magnesium Fluoride: MgF2. Mass of F = 18.9984032 g/mol. After you do that, you could see if your summation is right. Answer: D. 107 g. Given: 1.72 mol MgF2. Got me! Mass of Mg = 24.3050 g/mol. . No Magnesium Sulfate (MgSO4) has a mass of 121, and Sodium Chloride (NaCl) has a mass of 59. Mass of MgF2 = Mass of Mg + 2(Mass of F) = 24.3050 g/mol + 2(18.9984032 g/mol) = 62.3018064 g/mol The idea here is that you need to use the chemical formula for magnesium nitride ##Mg_3N_2## to calculate the mass of one mole of the compound i.e. How many grams are in 1.40 mol of sodium chloride (NaCl) 3. The helium balloon has more atoms. This means every molecule of magnesium … 13. I know that 1 mole of magnesium has a mass of 24.3 g. And I know that 1 mole of nitrogen has a mass of 14.01 g, and that 1 mole of oxygen has a mass of 15.99 g. Do you think that by adding the masses together, appropriately weighted, i.e. 1. 2. In a gas mixture composed of O2, Ne, and He, the partial pressure ofO2 is 0.90 atm, that of Ne is 3.1 a … tm, and that of He is 1.50 atm.