Author Question: Calcium carbide (CaC2 ) reacts with water to produce acetylene (C2H2 ): CaC2 (s) + 2H2O (g) Ca(OH)2 ... (Read 78 times)

asan beg · **on:** Aug 27, 2018

Calcium carbide (CaC2 ) reacts with water to produce acetylene (C2H2 ): CaC2 (s) + 2H2O (g) Ca(OH)2 (s) + C2H2 (g) Production of 6.5 g of C2H2 requires consumption of ________ g of H2O.

A) 2.3
B) 4.5
C) 9.0
D) 480
E) 0.048

Question 2

The uncertainty principle states that ________.

A) matter and energy are really the same thing
B) it is impossible to know anything with certainty
C) it is impossible to know the exact position and momentum of an electron
D) there can only be one uncertain digit in a reported number
E) it is impossible to know how many electrons there are in an atom

Mochi · **Reply #1 on:** Aug 27, 2018

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