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3 years ago

Mendeleev organized the elements:

Chemistry

1 answer:

pashok25 [27]3 years ago

4 0

Answer: (3)

Medeleev arranged elements in order of increasing atomic weight and similar properties

He noticed that similar elements were grouped together by using this.

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Zepler [3.9K]

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2 years ago

A chemical reaction in which bonds are broken is usually associated with ________. a chemical reaction in which bonds are broken

Reika [66]

Answer:The answer to the question is the release of energy. The bonds that bind a molecules atom's act as a storage of energy. One way it is released is when those bonds are broken and it is released outward in every direction. This breakage results in smaller molecules and not the formation of a larger molecule.

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2 years ago

_KOH + _H₂PO4 → _K₂PO4 + _H₂O

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Answer:

2KOH+H2PO4--K2PO4+4H2O

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3 years ago

What is most likely the amount of energy available at a trophic level of tertiary consumers if the amount of energy available to

meriva

Answer:

D.) 2,000 kilocalories would be the correct answer.

Explanation:

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2 years ago

Read 2 more answers

BASED ON THE INFORMATION BELOW. CALCULATE THE MASS FOR ONE OF THESE ATOMS:

stepladder [879]

C = 12 g

O = 16 g

H = 1 g

<h3>Further explanation </h3>

Conservation of mass stated that

<em>In a closed system, the masses before and after the reaction are the same </em>

we can calculate the mass of each atom in the compound :

O in O₂ :

mass O₂ = 32

mass O = 32 : 2 = 16 g

H in H₂O

mass H₂O = 18

mass 2.H + mass O = 18

mass 2.H + 16 = 18

mass 2.H=2

mass H = 1 g

C in CH₄

mass CH₄ = 16

mass C + mass 4.H = 16

mass C + 4.1=16

mass C = 12 g

or we can use formula :

Mass of a single C :

$\tt =\dfrac{Ar~C}{MW~CO_2}\times mass~CO_2\\\\=\dfrac{12}{44}\times 44=12$

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3 years ago