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Bas_tet [7]
3 years ago
12

Mendeleev noticed that certain similarities in the chemical properties of elements appeared at regular intervals when teh elemen

ts were arranged in order of increasing
Chemistry
1 answer:
Serga [27]3 years ago
8 0
Dmitri Mendeleev was born in Siberia, Russia. He was known to be very passionate about chemistry. His discovery of the repetitive properties common to objects with the same interval led to his development of the earliest version of the Periodic Table of Elements. With this, he was able to develop easier way to organize subjects. 
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24. When the equation
serg [7]

Answer:

Explanation:

3

Explanation:

The reaction expression is given as:

     Al(OH)₃  +   HNO₃   →    H₂O   +  Al(NO₃)₃  

To solve this problem, let us assign coefficient a,b,c and d to each specie;

          aAl(OH)₃  +   bHNO₃   →    cH₂O   +  dAl(NO₃)₃  

Conserving Al : a  = d

                  O:  3a + 3b  = c + 9d

                  H: 3a + b  = 2c

                  N: b  = 3d

let a = 1 , d  = 1, b  = 3 , c = 3

 Multiply through by 3;

a  = 1, b  = 3, c = 3 and d  = 1

  Al(OH)₃  +   3HNO₃   →    3H₂O   +  Al(NO₃)₃  

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3 years ago
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Karen is 17 years ild and has a BMI that indicates appropriate weight.She loves to eat all kinds of food. which strategy will be
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Answer

She needs to set boundaries

Explanation:

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4 0
3 years ago
Explain the composition of dna nucleotides and the structure of the dna molecule need help
Kaylis [27]

A nucleotide is composed of a phosphate group, sugar, and nitrogen base. DNA is made of 2 strands of nucleotides linked together by covalent bonds between the phosphate and sugar of each nucleotide. The strands of nucleotides are linked together by hydrogen bonds creating DNA. Hope this helps and sorry if I made a mistake.

4 0
4 years ago
The scientist most often credited with the idea that a quantum of light (photon) can act as a particle is:
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C.) It was Einstein who created quantum of light
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A student is shown a simple model of particles that make up a liquid,as shown.
trapecia [35]
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            Option-D : <span>Decrease the velocities of the particles, and decrease the space between the particles.

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3 years ago
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