How many electrons are gained or lost in the following half-reaction? C ? C-4

A. 2 electrons are lost
B. 1/2 electron is gained
C. 1/2 electron is lost
D. 2 electrons are gained
E. 4 electrons are gained

Answer: E

Environmental & Atmospheric Sciences

Which of the following is the simplest possible hydrocarbon?

A. HC CH
B. CH4
C. H2
D. C2H6
E. H2C CH2

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Environmental & Atmospheric Sciences

Explain how water can cause mechanical weathering

What will be an ideal response?

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Environmental & Atmospheric Sciences

About half of Arctic sea-ice volume has disappeared since 1970 due to warming throughout the region

Indicate whether the statement is true or false

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Environmental & Atmospheric Sciences

Which of the following Earth materials is least resistant to solution?

A) Aluminum B) Calcium C) Magnesium D) Sodium E) Limestone

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Environmental & Atmospheric Sciences