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Masja [62]
2 years ago
14

Hi. i need help with this. i lack with this subject

Chemistry
2 answers:
Vesnalui [34]2 years ago
8 0

Answer: It's the circulatory system

Explanation:

Marat540 [252]2 years ago
5 0

Answer:

It's the circulatory system

Explanation:

hope it helps you

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All of the following are good conductor's of heat except​
Andrei [34K]

Answer:

Insulators

Explanation:

Insulators consists of air, water etc.

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3 years ago
Why can polar water molecules pass through a cell membrane?
TiliK225 [7]
<span> Through osmosis because the membrane is partially permeable, osmosis is the movement of water molecules from a region of lower solute concentration to a higher solute concentration.
is the answer
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5 0
4 years ago
How many grams of aluminum chloride can be produced from 7.32g of ammonium perchlorate?
Alla [95]

Answer:

2.77g of AlCl_{3} can be produced.

Explanation:

Use stoichiometry.

Balanced equation: 3Al + 3NH_{4} ClO_{4} ⇒ Al_{2} O_{3} + AlCl_{3} +3NO + 6H_{2} O

NH_{4} ClO_{4}  :  AlCl_{3}

      3        :     1                        **n=\frac{m}{M}

 0.0623**   :    x                        n=\frac{7.32}{117.49}   = 0.0623

      3x=0.0623\\x=0.020767

n=\frac{m}{M}    

m=nM

m= (0.020767)(133.34)

m= 2.77g                                  

5 0
2 years ago
There are around muscles in the human body<br><br> 640<br> 250<br> 100
Gwar [14]
There are 640 muscles in the human body
6 0
4 years ago
The animal kingdom is divided into two small groups name these two smaller groups and give examples of each include the characte
Elina [12.6K]

Answer:

vertebrate and invertebrates

Explanation:

All Vertebrates  have a skeletal structure with a spinal backbone and well developed internal skeleton made up of bones and cartilage while Invertebrates have no backbone.

Vertebrate include fish, amphibians, reptiles, birds and mammals. Invertebrates include worms and jellyfish, spiders and crabs.

<u>common characteristics among vertebrates and invertebrates </u>

○ multi-cellular.

○ heterotrophs (cannot make their own food) and must get their energy by consuming plants or other animals.

○ obtain food and oxygen for energy,

5 0
3 years ago
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