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s2008m [1.1K]
3 years ago
8

When an electric current passes through water, _____ takes place, breaking down the compound into hydrogen and oxygen. a physica

l change an atomic change a chemical change an elemental change
Chemistry
2 answers:
PSYCHO15rus [73]3 years ago
5 0
Electrolysis takes place when an electric current passes through water.
pav-90 [236]3 years ago
4 0

Answer: a chemical change

Explanation:

A physical reaction is defined as the reaction in which a change in shape, size takes place. No new substance gets formed in these reactions.  Example: melting of ice

A chemical reaction is defined as the reaction in which a change in chemical composition takes place.A new substance is formed in these reactions.

Decomposition of water using electric current to produce hydrogen and oxygen is called as electrolysis and is a chemical change.

2H_2O\rightarrow 2H_2+O_2

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2H2 + O2 → 2H2O
pantera1 [17]
Okay
Mr (H2O)= 18g
therefore moles of H2O
is 720.8/18= 40.04mol
the ratio of H2 to O2 to H2O is
2 : 1 : 2
so moles of H2 is same as H2O here
H2= 40.04moles

moles of O2 is half
so 40.04 x 0.5
20.02moles

grams of O2 is
its moles into Mr of O2
that's 20.02 x 32 = 640.64g

6 0
3 years ago
How many Cl atoms are in Zn(ClO3)2?<br> O A. 2<br> O B. 1<br> O c. 3<br> O D. 6
White raven [17]
The answer cl atoms are in zn(cio3)2 is A:2 because I looked it up and it gave me 2.
3 0
3 years ago
What is the general procedure from extracting a metal from its ore
Veseljchak [2.6K]
<span>Ores are naturally occurring rocks that contain metal or metal compounds in sufficient amounts to make it worthwhile extracting them. For example, iron ore is used to make iron and steel.</span>
5 0
3 years ago
Which element has the smallest atomic radius? Fluorine, Iron, Phosphorous, Potassium
Ivahew [28]

Answer:

actually answer should be helium

7 0
3 years ago
Read 2 more answers
Please help!
Dahasolnce [82]

Answer:

reproduction

Explanation:

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6 0
3 years ago
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