chem %composition and law of proportions1

Presentation

•

Science

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9th - 10th Grade

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Practice Problem

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Medium

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NGSS

HS-PS1-7

Standards-aligned

Darrin Shrontz

Used 5+ times

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3 Slides • 5 Questions

chem %composition and law of proportions1

by Darrin Shrontz

Law of Definite Proportions

You may want to write down the definitions of these two fundamental concepts of Chemistry.. there will be questions next!

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

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.

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

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

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

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%

chem %composition and law of proportions1

by Darrin Shrontz

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chem %composition and law of proportions1

chem %composition and law of proportions1

​Law of Definite Proportions

chem %composition and law of proportions1

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Law of Definite Proportions