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babymother [125]
2 years ago
12

In the hot climate, human bodies had to adapt by increasing the number of ____________ on the skin to cool off the body.

Chemistry
2 answers:
ruslelena [56]2 years ago
5 0

Answer:

body hair

Explanation:

in the hot climate,human bodies had to adapt inscrasing the number of bodyhair on the skin to coll off the body

irga5000 [103]2 years ago
4 0
D none of the above
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Solid material whose atoms are arranged in a repeating pattern is ______
Alenkasestr [34]

Answer:

crystal structure

Explanation:

A crystal structure is an ordered arrangement of atoms,ions or molecules in a regular repeating pattern,it is a form of solid state of matter and differs from liquid and gaseous states of matte in which the atoms or molecules are random or haphazard.

7 0
3 years ago
For the galvanic (voltaic) cell Fe(s) + Mn2+(aq) → Fe2+(aq) + Mn(s) (E°= 0.77 V at 25°C), what is [Fe2+] if [Mn2+] = 0.040 M and
avanturin [10]

Answer:

0.01836 M

Explanation:

Again the reaction equation is;

Fe(s) + Mn2+(aq) → Fe2+(aq) + Mn(s)

E°cell= 0.77 V

Ecell= 0.78 V

[Mn2+] = 0.040 M

[Fe2+] = the unknown

n=2

From Nernst's equation;

Ecell= E°cell- 0.0592/n log Q

0.78= 0.77 - 0.0592/2 log [Fe2+] /[0.040]

0.78-0.77= - 0.0592/2 log [Fe2+] /[0.040]

0.01/ -0.0296= log [Fe2+] /[0.040]

-0.3378= log [Fe2+] /[0.040]

Antilog(-0.3378) = [Fe2+] /[0.040]

0.459= [Fe2+] /[0.040]

[Fe2+] = 0.459 × 0.040

[Fe2+] = 0.01836 M

7 0
3 years ago
Which family is made up of all radioactive elements
VARVARA [1.3K]

Answer:

actinide family

Explanation:

3 0
3 years ago
How many Atoms are in 12 NaBr
frozen [14]

Answer:

there are 12 atoms in 12 sodium bromide

7 0
2 years ago
What is the usable form of nitrogen that is found in the ground?
laila [671]
Nitrate

Hope this helps :))
5 0
3 years ago
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