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pochemuha
3 years ago
15

If a substance reacts with oxygen, the chemical reaction is most likely a combustion reaction. decomposition reaction. single re

placement reaction. double replacement reaction.
Chemistry
1 answer:
avanturin [10]3 years ago
7 0

Answer:

Option A is correct = combustion

Explanation:

When substance react with oxygen combustion is occur. The substance which burned is called fuel and in this process large amount of heat is released to the surrounding. It is exothermic process.

For example:

4Li + O₂    →      2Li₂O

2Mg + O₂    →    2MgO

 S +  O₂      →      SO₂  

The product which is formed as a result of combustion reaction are called oxides.  

In given examples we can see that lithium, magnesium and sulfur react with oxygen and product formed is oxides of respective elements such as lithium oxide ( Li₂O), magnesium oxide (MgO) and sulfur oxide ( SO₂ ).

Other options are incorrect because:

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

Decomposition reaction:

It is the reaction in which one reactant is break down into two or more product.

AB → A + B

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3 0
3 years ago
What percentage of a radioactive species would be found as daughter material after seven half–lives?
irinina [24]
0.78  is what the verified answer says 
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After the recycled plastic is released from the machine into the brick mold, explain what will happen to the kinetic energy in t
Rina8888 [55]

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8 0
3 years ago
calculate atomic weight of silver which has two isotopes with the following properties : silver-107 (106.91 amu, 51.84% natural
Julli [10]

Answer: The atomic weight of silver is 107.87 amu

Explanation:

Mass of isotope silver-107  = 106.91 amu

% abundance of isotope silver -107 = 51.84% = \frac{51.84}{100}=0.5184

Mass of isotope silver-109 = 108.90 amu

% abundance of isotope silver-109  = 48.16% = \frac{48.16}{100}=0.4816

Formula used for average atomic mass of an element :

\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})

A=\sum[(106.91\times 0.5184)+(108.90\times 0.4816)]

A=107.87amu

Thus atomic weight of silver is 107.87 amu

8 0
3 years ago
(42.7g +0.259g) / (28.444mL x 12.367)
Lorico [155]
As you mentioned the question in chemistry so it may be a concentration unit I.e mass per volume.
(SOLUTION)
Mass/volume = total mass/ total volume
Now:
Total mass= 42.95 g
Total volume =351.8mL
Put these values in above equation;
Mass/volume = 42.95/351
“”. = 0.122 g/mL
4 0
2 years ago
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