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miss Akunina [59]
2 years ago
11

Science please help me with this

Chemistry
2 answers:
nataly862011 [7]2 years ago
7 0

Answer:

a lack of genetic variety

first one is the correct one

kvv77 [185]2 years ago
6 0
A lack of genetic variety


The first one
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34kurt

Explanation:

Medieval number one. There you havt it.

4 0
1 year ago
List at least two chemical reactions that resulted in a yellow, orange, or red precipitate. For these reactions, list the possib
Katarina [22]
<span>1) 0.2M ferric nitrate is added gradually to 1M sodium hydroxide. In result, a red precipitate appears. The precipitate is ferric hydroxide. 
2) </span><span>0.2M potassium chromate is added gradually to 0.05M lead acetate. in result, a yellow precipitate appears. The precipitate is called potassium acetate. 
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7 0
3 years ago
Number of moles in 31.99g O2 <br> And 176.8g NaCl
sergey [27]

#O_2

\\ \sf\longmapsto No\:of\;moles=\dfrac{Given\:mass}{Molar\:mass}

\\ \sf\longmapsto No\:of\:moles=\dfrac{31.99}{32}

\\ \sf\longmapsto No\:of\:moles\approx 1

#NaCl

\\ \sf\longmapsto No\:of\:moles=\dfrac{176.8}{58.5}

\\ \sf\longmapsto No\;of\:moles=3mol

8 0
2 years ago
Explain why BH3 is trigonal planar and NH3 is trigonal pyramidal.
Troyanec [42]

Answer:o It is important to realise that mixing will be small unless there are electrons in the 4a1 LUMO, this is why NH3 is pyramidal while BH3 is planar! ... This mixing is very strong and stabilises the 3a1 MO substantially and hence NH3 is trigonal pyramidal and not planar.

Explanation:

3 0
3 years ago
What is the tube connecting the larynx and the lungs?
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