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kobusy [5.1K]
3 years ago
6

What is a substance that cannot be broken down further by chemical means

Chemistry
1 answer:
IgorC [24]3 years ago
8 0
Anything can be broken down, as long as it is not as small as an atom
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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

7 0
3 years ago
When an atom loses electrons it undergoes ____.
Karo-lina-s [1.5K]
When a atom loses electrons it becomes a ion
3 0
3 years ago
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What is the ΔG for the following reaction at 25°C?
ikadub [295]
\Delta G_{global}=\Delta G_{products}-\Delta G_{reagents}\\\\&#10;\text{We should consider the stoichiometry:}\\\\&#10;\Delta G=2\Delta G_{NO_2}-\Delta G_{N_2O_4}\\\\&#10;\Delta G=2\cdot51.8-98.28=103.6-98.28\\\\&#10;\boxed{\Delta G=5.32~kJ}
4 0
2 years ago
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Match each part of the electrochemical cell with its function.
umka21 [38]

Hi!


The correct options would be:

1. Cathode - <em>reduction</em>

The cathode is the negatively charged electrode, and so has an excess of electrons. Cations (positively charged ions) are attracted to the cathode, and gain electrons to acquire a neutral charge. The process in which a gain of electron occurs is called reduction.


2. Anode - <em>oxidation</em>

The opposite occurs at the anode which is positively charged and attracts negatively charged ions, anions. These anions lose their electrons at the anode to acquire a neutral charge, and the process involving loss of electrons is known as oxidation.


3. Salt Bridge - <em>ion transport </em>

Salt bridge is a physical connection between the the anodic and cathodic half cells in an electrochemical cell and is a pathway that facilitates the flow of ions back and forth these half cells. Salt bridge is involved in maintaining a neutral condition in the electrochemical cells, and its absence would result in the accumulation of positive charge in the anodic cell, and negative charge in the cathodic cell.


4. Wire - <em>electron transport </em>

Wires have a universal role of being a pathway for the transport of electrons in circuit. This role is also the same in the wires involved in an electrochemical cells where they are used to transport electrons from the anodic half cell, and this electron transport results in the generation of electricity in the internal circuit of the electrochemical cell.


Hope this helps!

4 0
3 years ago
What do S-shadows tell us about the interior of the earth?
AlekseyPX
<span>S-shadows tells that the earths interior is liquid.</span>
7 0
3 years ago
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