We measure ordinary objects either by counting or weighing them, depending on which method is more convenient Silberberg, M. 2010. Principles of General.
STP Gas Calculations One-step problems: A balloon is filled with 3.78 L of He gas at STP. How many moles of helium atoms are inside? He Solution: 3.78.
A Chemist’s Dozen Today you will only need to copy slides that have a TEAL background.
We frequently refer to measures casually… Couple Few Dozen Baker’s Dozen Ream LORD 2 3 12 13 500 4.
Orion Nebula: Star-forming Region. Solar Nebula Flattening the Solar Nebula.
The Mole Concept. What is a mole? IIn chemistry, a mole is a counting unit. Abbreviated mol. 11 mol = 6.022x10 23 representative particles. Avogadro’s.
Chapter 18 Fossil Fuels and the Environment. Fossil Fuels Forms of stored solar energy created from incomplete biological decomposition of dead organic.
The Mole Unit 5. Formula Mass Formula mass - (also called gram formula mass, molecular mass, formula weight, gram formula weight, molecular weight, gram.
Quantitative Composition of Compounds Chapter 7. Avogadro’s Number How do we count atoms? –Dozens? Reams?
How systems depend on CARBON and CHEMICAL ENERGY
C: 4 January 2012 Grab a calculator and find your new seat. Objective: You will be able to: convert between number of atoms/molecules, moles and.
The Mole What's a mole? In chemistry, a mole is a counting unit. What does that mean? –1–1 dozen = 12 units(ie eggs,donuts) –1–1 mole = 6.02x10 23 particles.