Chapter 5

Question 1

What’s Avagadro/s number (Na)?

Answer 1

6.022 * 10^23

Question 2

The order to go from particles to grams.

Answer 2

Particles to moles and then t particles. You use Avogadro’s number to get to mole and molar mass to get to grams.

Question 3

How to balance an equation?

Answer 3

Ensure the number of each element.

Question 4

Steps for Stoichiometry from grams of A to grams of B?

Answer 4

From gA to mol A with molar mass and to mol B with the reaction coefficients and to gram B with molar mass.

Question 5

How to figure out limited reagent?

Answer 5

Balance the reaction, make sure both reactants go from mass to mole, use the coefficients to get s# of moles from each reactants, determine the smallest. With you decision calculate the yield (LR * MM of product/1mol)

Question 6

What’s the equation for percent yield?

Answer 6

percent yield = actual yield/expected yield *100

Question 7

What’s the difference between exothermic and endothermic reactions?

Answer 7

Exothermic reactions have heat/energy released, walking downhill, change in heat is under 0. Endothermic reactions require energy, change in heat is over 0.