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A __________ is scientific knowledge established through
direct observation
and remains constant. Scientific knowledge can change
when scientists
___________ - ANSWER-
1. fact
2. conduct
experiments
What is the chemical name of the covalent compound P4S3?
- ANSWER-C.
tetraphosphorus
trisulfide
Match the chemical name of each oxide of phosphorus to its
chemical formula. -
ANSWER-phosphorus
monoxide > PO
diphosphorus tetroxide > P2O4
, tetraphosphorus heptoxide > P4O7
diphosphorus pentoxide > P2O5
Which statements correctly match a chemical name with its
formula? Use the list of polyatomic ions and the periodic table
to help you answer. - ANSWER-B.
The chemical formula for ammonium hypochlorite
is NH4ClO. C. The chemical formula for ammonium
nitrate is NH4NO3.
What is the chemical name of the compound Cu(NO3)2? Use
the list of polyatomic ions and the periodic table to help you
answer. - ANSWER-C.
copper(II) nitrate
What is the formula of the compound vanadium(V) oxide?
Use the list of
polyatomic ions and the periodic table to help you answer. -
ANSWER-D. V2O5
Match each alkane name with its structure. - ANSWER-C3H8 >
propane
C7H16 > heptane
C8H18 > octane