CHEM 120 EXAM 2 REVIEW

30 questions
3-4 worked out problems
Show all work, units, conversion
Practice, practice, practice
Equation sheet provided
Week 3 Concepts
Law of conservation of mass states that mass can not be
gained or lost in a chemical reaction.
Number of atoms of every element on both sides of an
equation must be equal.
Reactants Products
KOH + H3PO4 ---------------------> K3PO4
+ H2O
Fe + H2SO4
-------------------> Fe2
(SO4
)3
+ H2
Mole is a measure that represents Avogadro’s number or 6.022 X 1023 atoms.
A mole of two different substances will not have the same mass.
The periodic table gives us the atomic mass of every element. That atomic
mass is indicated by g/mol (grams/mole). This is also the number of grams
needed to give us 6.022 X 1023 atoms of that element.
To determine the atomic mass of a compound, known as the molar mass, we
would add the atomic masses of all atoms of every element in that compound.
What is the atomic mass of Zn?

No comments found.

jordancarter 6 months ago

This study guide is clear, well-organized, and covers all the essential topics. The explanations are concise, making complex concepts easier to understand. It could benefit from more practice questions, but overall, it's a great resource for efficient studying. Highly recommend!

A. You will receive a PDF that is available for instant download upon purchase. The document will be accessible to you at any time, from anywhere, and will remain available indefinitely through your profile.

A. Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

A. you are buying this document from us learnexams

A. No, you only buy these notes for $ indicated . You are not obligated to anything after your purchase.

A. check our reviews at trustpilot

Add To Cart

Buy Now