1 / 12

MOLAR MASS

MOLAR MASS. What is molar mass? How do you calculate molar mass?. WHAT IS MOLAR MASS?. mass in grams of 1 mole of the element Molar Mass = ___ grams____ ( MM) 1 Mol Synonyms: molecular weight, gram formula unit. Use Periodic Table to determine MM!.

karma
Télécharger la présentation

MOLAR MASS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MOLAR MASS What is molar mass? How do you calculate molar mass?

  2. WHAT IS MOLAR MASS? • mass in grams of 1 mole of the element • Molar Mass = ___grams____ (MM) 1 Mol Synonyms: molecular weight, gram formula unit

  3. Use Periodic Table to determine MM! • Let’s examine periodic table! • If I had one mole of _____ it’s molar mass would be _______ g per 1 mol.

  4. Carbon MM= 12.0 g / mol • Atomic Hydrogen MM= 1.0 g / mol • Mercury MM= 200.6 g / mol • Iron MM=55.8 g / mol • Sulfur MM= 32.1 g / mol

  5. How many particles do these elements contain? Particles: Atoms Formula Units Molecules

  6. How do you calculate molar mass of compounds? SO3 • EX. Sulfur Trioxide Chemical Formula = _____________ • How many total atoms make up one molecule? • Atoms = _____________ • S: ___ x ______ = • O: ___ x ______ = _____ + • The molar mass of sulfur trioxide = _______ grams per ________ 1 + 3 = 4 1 32.1 32.1 48.0 16.0 3 80.1 80.1 1 mol

  7. Your Turn PCl3 • EX. Phosphorus Trichloride Chemical Formula = __________ • How many total atoms make up one molecule? Atoms = ________ • P: ___ x ______ = • Cl: ___ x ______ = _________ + • Sodium Hydrogen Carbonate NaHCO3 1+3=4 1 31.0 31.0 3 35.5 106.5 137.5 grams per 1 mol MM = 84.0 g / mol

  8. Representative Particles molecules • Covalent Compounds are made up of _____. • Ionic Compounds are made up of _________. • Elementsare made up of _____________. • Use your Road Map! Formula units atoms

  9. Conversions Using Molar Mass • Book pg. 298 • Ex. #1 Write the chemical formula for aluminum oxide _________ • What is given? Trying to find? • ______________ x _______________ = g of Al2O3 GIVEN Al2O3 9.45 moles g of Al2O3 9.45 moles Al2O3 102.9 grams Al2O3 964 1 Mole Al2O3 Al: 2 x 27.0 = 54.0 g O: 3 x 16.0 = 48.0 g + 102.0 g / 1 mol

  10. Molar Volume Conversions • At STP (Standard Temp and Pressure): • 1 mole of gas = 22.4 L = 6.02 x 1023 particles

  11. 1 Mole of ANY GAS at STP!

  12. Sample Problem 10.7 Use our Mole Road Map! • Sample Problem 10.8 • REMEMBER! Density = mass = grams Volume Liter • HINT: If given density, first find the molar mass (MM) = gramsper mol

More Related