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Ainat [17]
3 years ago
14

How come flowers usually contain more stamen the pistils

Chemistry
1 answer:
USPshnik [31]3 years ago
5 0
<span>To make sure there are enough pollen to fertilize the seeds from the pistil. Not all pollen can make it to the pistil. It's the same as animals producing millions of sperms although only one is needed for fertilization.</span>
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Wegener's claim was that the continents drifted from their original positions in Pangea
steposvetlana [31]

Answer:

Imagine that you are a farmer in ancient Egypt. You must carefully plan around the flooding of the Nile in order to raise your crops.

Starting with planting (number 1), use the numbers 1 - 5 to place the following events in the correct order.

1 The floodwater recedes and you plant your crops.

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The Nile Valley is flooded again.

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Explanation:

7 0
3 years ago
Propose the structure of the following HNMR data.
Varvara68 [4.7K]

Answer:

1-Chloropropane is likely the answer (attached a picture)

Explanation:

First off there are 3 peaks and 3 carbons which indicates to me that this will be a chain without any symmetry and that each carbon has hydrogens on it.  

Second the triplet at 1.0 that integrates to 3 likely correlates to a CH3 (methyl) group.  Peaks are very upfield triplets that integrate to three are almost always methyl peaks.

Third the triplet at 3.7 is indicative of being next to the halogen.  Hydrocarbons by themselves do not have peaks that far downfield meaning that its shift could only be explained by the chlorine being involved.  Also we know that this can't be next to the methyl group since its multiplicity is to low to be next to it.  

That leaves the multiplet at 1.75 being the hydrogens on the middle carbon which also makes sense since it is more downfield then the methyl group (due to being closer to the chlorine) but is not far enough downfield to say the chlorine is there.  It also makes sense that it is a multiple since it would be a hextet due to the adjacent 5 hydrogens which can't always be resolved.

I hope this helps and let me know if anything is unclear or needs further explanation.

7 0
3 years ago
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jolli1 [7]
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The formal charge on each atom can be known by counting up the number of valence electrons that is present on each atom.

<h3>What is Lewis structure?</h3>

The term Lewis structure is the representation of a compound using its symbols and showing the valence electrons as dots. This question is incomplete as the Lewis structures were not shown.

If it is shown, we can know the formal charge on each atom by counting up the number of valence electrons that is present on each atom.

Learn more about Lewis structure: brainly.com/question/4144781

8 0
2 years ago
The group that does not receive a treatment during an experiment is called the?
REY [17]
Independent group 123456789
5 0
3 years ago
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