chem %composition and law of proportions1
Presentation
•
Science
•
9th - 10th Grade
•
Practice Problem
•
Medium
Standards-aligned
Darrin Shrontz
Used 5+ times
FREE Resource
3 Slides • 5 Questions
1
by Darrin Shrontz
2
You may want to write down the definitions of these two fundamental concepts of Chemistry.. there will be questions next!
3
Poll
What is the term for the ratio (as a percentage) of each element to the total mass of the compound?
definite proportion
percent by mass
percent by element
percent proportion
4
This table depicts how % by mass is the same for each element in a compound (of sucrose).
It is not unusual to be asked questions that ask you to determine the mass of the element, given the % by mass and the total mass of the compound.
5
Poll
The Law of Definite proportions is...
compound is always composed of the same proportions and percentage of mass
compound is always composed of the same elements in the same proportions by mass
elements are always composed of the same elements in the same proportions by mass
compounds are not composed of elements, but rather elemental proportionalities
6
Multiple Choice
What is the term for the ratio (as a percentage) of each element to the total mass of the compound?
definite proportion
percent by mass
percent by element
percent proportion
7
Multiple Choice
The Law of Definite proportions is...
compound is always composed of the same proportions and percentage of mass
compound is always composed of the same elements in the same proportions by mass
elements are always composed of the same elements in the same proportions by mass
compounds are not composed of elements, but rather elemental proportionalities
8
Multiple Choice
In a 400 g sample of CsCl, there are 316 grams of Cs. What is the % of Cs in CsCl?
41%
45%
78%
89%
by Darrin Shrontz
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