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Firdavs [7]
3 years ago
8

Which of the following statements is true?

Biology
1 answer:
almond37 [142]3 years ago
8 0
B is the only true statement
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Which of the following is not involved in petrification? a. minerals fill the cells of the tree c. the tree is buried b. water s
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I think the correct answer would be D. In the process of petrification, a tree burning is not included. Petrification is a process that involves organic materials turning into fossils by replacing the original contents of a certain object with minerals.
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Which structure is the arrow pointing to
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Answer:

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1 mol 2 mol  

84g of N2(g) = 84/28 = 3 mol of N2(g)  

From the above reaction 1 mol of N2(g) gives 2 mol 0f NH3(g). So 3 mol of N2(g) should give 6 mol or (6x17) 102 g of NH3(g). But we are getting only 85.0 g of NH3.  

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Answer D. is correct.  

2. 2HgO (s) --------------------- 2Hg (l) + O2 (g)  

2 mol 2 mol 1 mol  

4 mol 4 mol 2 mol  

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6 0
3 years ago
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A student does an experiment for a science fair to study whether temperature affects the timing of a cricket’s chirps. The stude
Oduvanchick [21]

timing of the cricket’s chirps

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Draw and label a segment of dna showing its helix and complementary base pairing
mafiozo [28]
Attached are two images concerning DNA. 

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The second image shows the helical structure of the DNA.

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3 years ago
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