CHEM 111 Exam 1 Review 77 Questions with Verified Answers
physical vs. chemical change - CORRECT ANSWER physical- does not change the substance.
change in matter but nor chemical composition
chemical- substance is changed.
energy is absorbed or released.
one or more substances being used
...
CHEM 111 Exam 1 Review 77 Questions with Verified
Answers
physical vs. chemical change - CORRECT ANSWER physical- does not change the
substance.
change in matter but nor chemical composition
chemical- substance is changed.
energy is absorbed or released.
one or more substances being used
solid - CORRECT ANSWER often rigid with definite shape
gas - CORRECT ANSWER fills container and is easily comressed
liquid - CORRECT ANSWER flows and takes shape of container, has a op surface
2 types of mixtures - CORRECT ANSWER heterogeneous- not uniform through out
mixture
homogeneous- uniform through out mixtre
Pure substances are _____ or _____: - CORRECT ANSWER compounds- can be
decomposed by chemical means into simpler substances
elements- substance cannot be decomposed into simpler substances
which can be reversed by changing the temperature?
A. dew condensing on a leaf
B. an egg turning hard when it is boiled
C. ice cream melting
D. batter cooking on a hot griddle - CORRECT ANSWER A & C
matter - CORRECT ANSWER anything with mass and volume
, mixture - CORRECT ANSWER 2 or more elements or compounds in varying
mixtures, & components retain their properties. separated by physical means
salt water: homo or hetero mixture? - CORRECT ANSWER homogeneous mixture
Some metal alloys (steel,brass) :homo or hetero mixture? - CORRECT ANSWER
homogeneous mixture
Pure and Dry Air: homo or hetero mixture? - CORRECT ANSWER homogeneous
mixture
Aqueous solutions (aq): homo or hetero mixture? - CORRECT ANSWER
homogeneous mixture
Fog: homo or hetero mixture? - CORRECT ANSWER heterogeneous mixture
Vegetable soup: homo or hetero mixture? - CORRECT ANSWER heterogeneous
mixture
Whipped cream: homo or hetero mixture? - CORRECT ANSWER Heterogeneous
mixture
fundamental Unit for:
length-
mass-
time-
temperature-
Amount of substance-
luminous intensity- - CORRECT ANSWER meter
gram
second
kelvin
mole
candela
Water boils:
K-
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