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Alex
3 years ago
9

How did Mendeleev arrange the known elements in his periodic table? O A. According to the number of protons O B. According to th

e number of electrons O C. According to atomic mass O D. According to atomic number​
Chemistry
1 answer:
jeka943 years ago
6 0

Explanation:

Features of Mendeleev's tables

Mendeleev arranged the elements in order of increasing relative atomic mass . When he did this he noted that the chemical properties of the elements and their compounds showed a periodic trend .

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Mass can be created and destroyed.
Musya8 [376]

Answer:

Conservation of Energy and Mass

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. ... Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.

5 0
3 years ago
What is the definition of chemistry
Andrei [34K]
<h2>Definition:</h2>

Chemistry is the study of matter, it's properties, how and why substances combine or separate to form other substances, and how substances interact with energy. Chemistry is one of the physical sciences that help us to describe our world.

<h2>sentence examples:</h2>

•chemistry is a little hard.

•chemistry is fun to do!

<h2>synonyms:</h2>

•system

•organizing

•structure

•plan

•standard

•assembly

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<h2>antonyms:</h2>

•imbalance

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<h2>Origin:</h2>

Chemistry comes from Arabic word al-Kimia which means the art of transformation. Chemistry began as the study of alchemy.

5 0
3 years ago
PLEASEEE HELPPP!! Due today!!!!
dolphi86 [110]

Answer:

B

Explanation:

A chemical reaction equation is balanced if the number of atoms of each element on the right hand side of the reaction equation is the same as the number of atoms of the same element on the left hand side of the reaction equation.

By inspection, the chemical reaction written in the question is a balanced chemical reaction equation.

However, the statement in option B that more molecules of N2 are needed to produce NH3 than molecules of H2 is a false statement since only one mole of N2 and three moles of H2 are required to produce NH3 according to the reaction equation as written in the question.

3 0
3 years ago
Fine pebbles are 2.0 to 5.0 mm in diameter. Sand is 0.05 to 2.0 mm in diameter. Which of the following statements is true? Fine
Anton [14]
Fine pebbles have a higher threshold velocity than sand

~ hope this helps! ❤️
4 0
4 years ago
Read 2 more answers
Was the acetylacetone miscible with water? What about if NH3 is added to the solution? Why?
luda_lava [24]

Answer:

See explanation

Explanation:

The compound is acetylacetone. This compound is immiscible with water because it is completely nonpolar.

However the introduction of ammonia, leads to the ionization of the specie. In the presence of a base(such as NH3), the molecule acetylacetone is deprotonated and its corresponding anion is formed. This anion can now interact with water and become miscible with it.

4 0
3 years ago
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