Which of the following is correct when constructing a line-angle formula for an alkane?
A) Each line represents a carbon to carbon bond.
B) Each vertex represents a hydrogen atom.
C) A line ending is space represent a carbon atom to which two hydrogen atoms are attached.
D) All are correct in the construction of a line-angle formula.
A
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Rock sequences found on land that consist of deep-sea sediment, oceanic crust, and upper mantle are
called ____________________. These sequences are used to identify ____________________ plate boundaries. Fill in the blank(s) with the appropriate word(s).
The Delaney clause of the FFDCA became increasingly problematic because
A) of the introduction of new pesticides. B) organic farming required the elimination of all traces of pesticides from certified organic products. C) more sensitive analytical chemical techniques could detect previously unknown traces of pesticides. D) humans appear to be more and more sensitive to carcinogenic compounds.
Which migrant population likely originated in Taiwan and depended on fishing, farming, and domesticated animals for their livelihood?
a. Aborigines b. Papuans c. Austronesians d. Torres Strait Islanders e. Maori
All of the following statements concerning minerals are correct except
A. some minerals are produced by biological processes. B. minerals are naturally occurring substances. C. minerals are crystalline solids. D. minerals exist as elements or compounds.