CHEM 120 Exam 1 (One) Prep & Study Guide with complete solutions | Latest 2025/2026 Update – Chamberlain.

CHEM 120 Exam 1 (One) Prep & Study i,- i,- i,- i,- i,- i,- i,- i,-




Guide with complete solutions | Latesti,- i,- i,- i,- i,- i,-




2025/2026 Update – Chamberlain. i,- i,- i,-




Characteristics of exact numbers i,- i,- i,- i,-i,- i,- - no uncertainty
i,- i,-




- occurs in definitions, counting, and simple fractions
i,- i,- i,- i,- i,- i,- i,-




Examples of exact numbers i,- i,- i,- i,-i,- i,- 3/5, 5/9, 12 dozen, 7 cats
i,- i,- i,- i,- i,-




Characteristics of inexact numbers i,- i,- i,- i,-i,- i,- - number has degree of
i,- i,- i,- i,- i,-



uncertainty associated i,- i,-




- occurs anytime a measurement is taken
i,- i,- i,- i,- i,- i,-




Examples of inexact numbers i,- i,- i,- i,-i,- i,- height is 5'6", the table is 7'x4' i,- i,- i,- i,- i,- i,-




(rules of sig figs)
i,- i,- i,- i,-




all nonzero digits are:
i,- i,- i,- i,-i,- i,- significant


(rules of sig figs)
i,- i,- i,- i,-




leading zeros are: i,- i,- i,-i,- i,- never significant (0.0141, 0.0000058)
i,- i,- i,-

,(rules of sig figs)
i,- i,- i,- i,-




confined zeros (zeros between nonzero digits) are:
i,- i,- i,- i,- i,- i,- i,-i,- i,- always
i,-



significant
(3.063, 0.00104) i,-




trailing zeros (zeros at the end of a number) are :
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-i,- i,- significant i,-



IF decimal is present in the number (56.00)
i,- i,- i,- i,- i,- i,- i,- i,-




NOT significant IF decimal is not explicitly present (59,000,000)
i,- i,- i,- i,- i,- i,- i,- i,-




charge/location of electron i,- i,- i,-i,- i,- -1 charge/electron cloud
i,- i,-




charge/location of proton i,- i,- i,-i,- i,- +1 charge/mass/nucleus
i,-




charge/location of neutron i,- i,- i,-i,- i,- neutral charge/nucleus i,-




Definite shape, definite volume
i,- i,- i,- i,-i,- i,- solid


indefinite shape, definite volume i,- i,- i,- i,-i,- i,- liquid

, indefinite shape, indefinite volume
i,- i,- i,- i,-i,- i,- gas


define matter
i,- i,-i,- i,- anything that has mass and takes up space
i,- i,- i,- i,- i,- i,- i,-




what is not considered matter?
i,- i,- i,- i,- i,-i,- i,- light, heat, electricity i,- i,-




pure substance
i,- one substance; definite and constant i,-i,- i,- i,- i,- i,- i,- i,-



composition; can't be separated into 2 kinds of matter by physical
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-



means; single kind of matter
i,- i,- i,- i,-




heterogeneous mixture i,- i,-i,- i,- nonuniform in appearance; visibly i,- i,- i,- i,-



different phases i,-




homogeneous mixture i,- i,-i,- i,- visibly one distinct phase; uniform
i,- i,- i,- i,- i,-



properties


examples of pure substances i,- i,- i,- i,-i,- i,- water, sugar, table salt i,- i,- i,-




examples of heterogeneous mixtures
i,- i,- i,- i,-i,- i,- trail mix, chocolate chip
i,- i,- i,- i,-



cookies, cereal and mixi,- i,- i,-