b) molecules in one mole of O 2. c) marbles in one mole of marbles. 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 So magnesium nitride is an ionic compound made up of magnesium cations ##Mg^(2+)## and nitride anions ##N^(3-)##. One mole is 6.02x10^23 molecules of that compound. 1. Answer: D. 107 g. Given: 1.72 mol MgF2. 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. The atomic weight of magnesium is 24.305, therefore its molar mass is #"24.305 g/mol… Molar mass is the mass of one mole of a compound. How many molecules of … 1xxMg + 2xxN + 6xxO, you would arrive at the formula mass of Mg(NO_3)_2? How many grams are in 1.40 mol of sodium chloride (NaCl) 3. 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 ________. The mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon. This means every molecule of magnesium … its molar mass. 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. d) all of the above. 13. The formula for magnesium oxide is MgO. The helium balloon has more atoms. 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. Mass of Mg = 24.3050 g/mol. A gas mixture contains 1.05 mol of O2 and 5.21 mol of N2. The molar mass of an element is its atomic weight (relative atomic mass) on the periodic table in g/mol. 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? 2. Mass of MgF2 = Mass of Mg + 2(Mass of F) = 24.3050 g/mol + 2(18.9984032 g/mol) = 62.3018064 g/mol Mass of F = 18.9984032 g/mol. A single molecule of a certain compound has a mass of 3.4x10-22 g. . Got me! No Magnesium Sulfate (MgSO4) has a mass of 121, and Sodium Chloride (NaCl) has a mass of 59. What is the mass of 7.50 moles of magnesium chloride, MgCl2? Dalton's Law of Partial Pressure1. Relevant information: Magnesium Fluoride: MgF2. Whatis the total pressure of the mixture?2. 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. After you do that, you could see if your summation is right.
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