Today we went over lessons 24 and 25 which closely correspond. Beginning with chapter 24, it is important you look at the coefficient to determine your molar ratio. The mole ratios are the proportions in which two substances (reactants, products, or both) combine or form. A mole ratio is the ratio represented by the coefficient in a chemical equation showing how many units of each substance must combine to make the maximum amount of products. When reactants are not combined in their exact mole ratios, one of the reactants runs out (limited reactant) and the other is left over (excess reactant). For example, N2 + 2H3---> 2NH3, the 2H3 will run out first because you need more of it to complete the equation. It is a 1:2 ratio. Lastly, when comparing any two things on a balanced equation, you HAVE to compare the moles <---- important!! Homework below (didn't make any sense!!)
In chapter 25, the main things to know is that in order to determine the mass of product produced by a certain mass of reactant, it is important to convert the mass to moles and then back to mass. Calculations involving mole ratios and masses of reactants and products, are referred to as gram-mole conversions, or stoichiometry calculations. Use the handy dandy chart to help! Go through the "mole tunnel" :) again super uber confusing homework below. Barely any of either chapter is filled out, because it makes no sense!!!!!!
Homework (confusing!!!!!!!!!!!):
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Great job Holly! You should probably talk to Mrs. McDowell before giving up though, I mean come on.
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