Why does oil not dissolve in water?
a. It forms a solution with water
b. It has ionic bonds.
c. It is found within tissues of organisms.
d. It is a polar molecule.
e. It forms a mixture with water.
e
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Which classification is so large it is considered a domain?
A) Monera B) Plantae C) Bacteria D) Animalia
Why are ancient impact craters difficult to identify on Earth?
A) they typically have been eroded or infilled with younger sediments B) impact craters on Earth are smaller than those on the Moon or Mars C) they typically lack shock metamorphic minerals D) there have been very few meteorite impacts on Earth
Which one of the following is the broadest scope of ecological study?
A) Ecosystem ecology B) Landscape ecology C) Population ecology D) Community ecology
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 total 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)