How many moles of oxygen are consumed during the complete combustion of one mole of ethanol?
A) 1
B) 2
C) 3
D) 4
C
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The price/quantity intersection marked "a" in the graph represents a(an) ________ economy.
A. Modern B. Elastic C. Frontier D. Developed E. Developing
The oldest known continental crust is ___________ years old. What will be an ideal response?
When a solution of ammonium chloride, NH4Cl, is added to a solution of lead(II) nitrate, Pb(NO3)2, a white precipitate of lead chloride, PbCl2, forms. Which of the following is the net ionic equation for this reaction?
A) 2 NH4Cl(aq) + Pb(NO3)2(aq) ? PbCl2(s) + 2 NH4NO3(aq) B) 2 NH4+(aq) + 2 Cl-(aq) + Pb2+(aq) + 2 NO3-(aq) ?PbCl2(s) + 2 NH4+(aq) + 2 NO3-(aq) C) Pb2+(aq) + 2 Cl-(aq) ? PbCl2(s) D) Pb2+(aq) + Cl22-(aq) ? PbCl2(s)
Structures built on the side of a beach-cliff in order to protect it can be thought of as permanent.
Answer the following statement true (T) or false (F)