PPT-Molar Mass & Conversions

The Mole mole mol SI Unit for the amount of a substance that contains as many particles as there are atoms in exactly 12g of carbon12 A unit of counting like the dozen Avogadros Number. Calculate the following percentage by mass:. percent = portion/total x 100. If two samples are the same substance, they should have the . same percent composition by mass.. A compound will have the same physical and chemical characteristics.. …. handouts on door. binders. 2. Begin the Do Now . . Track Your Progress on QUIZ . LTs. . handout . (15 min. ). . The Mole and Molar Mass!. What do the following all have in common?. What doesn’t belong?. Q: how long would it take to spend a mole of $1 coins if they were being spent at a rate of 1 billion per second?. Background: atomic masses. Look at the “atomic masses” on the periodic table. What do these represent?. CHAPTER 7-2. How to find the molar mass of an element. The . molar mass . of any substance is the mass (in grams) of one mole of the substance.. It is expressed as grams/mole (. g/. mol. ).. The molar mass of . Molar Mass. Molar mass- same as atomic mass but for a compound rather than an atom.. To determine the molar mass of any compound you add up the atomic mass of all atoms present.. NaCl. 22.99 35.45 = . Atomic Mass. What is an elements atomic mass?. The weighted average of its naturally occurring isotopes. .. When looking at an element on the periodic table of elements, where is atomic mass found?. Usually the top left hand corner of each elements box. However, on the periodic table that you will use for your AP Exam(s), this number will be located below each elements chemical symbol.. Molar Volume. 1 . mol. of gas = 22.4 L .  molar volume. What volume would be occupied by 0.77 moles of helium gas at STP?. Density of Gases. Density = molar mass/molar volume. What is the density of (in grams per liter) of carbon dioxide gas at STP?. 12.00 g C-12 = 1 mol The number of particles in 1 mole isatoms 1 mol6.022 binders. 2. Begin the Do Now . . Track Your Progress on QUIZ . LTs. . handout . (15 min. ). . The Mole and Molar Mass!. What do the following all have in common?. What doesn’t belong?. Dozen. Couple. What things were mixed? What was made?. Chemical Reactions. Chapter 7. Are you into them?. . Intro Reaction Lab – Ziploc Science. Four Substances. Sodium bicarbonate. Bromothymol. blue. Calcium chloride. The Mole in Chemistry . Not this!!. Not this!!!. The Mole. The mole is a counting unit. 1 pair = 2. 1 dozen = 12. 1 mole = 6.022 x 10. 23. atoms. This number is known as Avogadro’s number after Italian chemist . The molar mass of an element is useful to convert moles of an element to grams, or grams . to moles. . . . For example, 1 mole . of . sodium has . a . mass . of . 22.99 grams.. Learning Goal . Calculate the molar mass of a .  . What’s a mole?. The . mole. is a unit of . measure. .. Just like meters tells us . length. and seconds tells us how much . time. , . the . mole. measures an . amount. . (how much).. Units of measure similar to mole include: . First lesson of our next unit: U7 Stoichiometry . P3 Challenge – . Determine the number and kinds atoms for the chemical formula Al. 2. (SO. 4. ). 3. Today’s Objective –. Moles and particles. Assignment: .