Answer:
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Answer:
The footprints of a dinosaur and the burrow of an ancient shrimp are examples of - Trace Fossils
Explanation:
A trace fossil or ichnofossil is defined as a geological record of biological activity. These provide us with indirect evidence of life in the past, such as the footprints, burrows, tracks, borings, etc that are left behind by animals, rather than the preserved remains of the body of the actual animal itself.
<span>Answer:
The total anion concentration = 6.0 + 2x12.0 + 3.0 = 33.0mEq/L</span>
Answer:
C. Less symmetrical than non-polar.
Explanation:
If molecule is symmetrical it can contain polar bond, but sum of all polar moments are equal to zero, and therefore molecule is non-polar.
Hydrogen atom is usually very easy to "polarize", respectively to drag electron pair from it. Because of that lots of molecules that contain hydrogen atoms are polar. Of course greater role in polarity is symmetry of molecules.
Answer:
a. magnesium
b. nitrogen
Explanation:
Barium and magnesium are both in 2nd group, so most similar compounds.
Nitrogen - 15 group, so it forms least similar to barium compound.