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expeople1 [14]
3 years ago
6

Natural gas is methane and it is combined with oxygen to produce carbon dioxide gas and

Chemistry
1 answer:
frez [133]3 years ago
7 0

Answer:

Negative

Explanation:

Enthalpy changes are heat changes accompanying physical and chemical changes. An enthalpy change is the difference between the sum of the heat contents of products and sum of the heat contents of reactants.

     

In exothermic change, heat is liberated to the surrounding. The surrounding becomes hotter at the end of the changes.

Enthalpy change is assigned a negative sign as the sum heat contents of products is less than that of the reactants.

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How is the number of neutrons in the nucleus of an atom calculated?
OLEGan [10]
The correct answer is C
5 0
4 years ago
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How do i balance C6H12O6+O2 > H2O+CO2
xenn [34]

Answer:

C6H12O6+6O2

Explanation:

c=6

H=12

O=6+2=8

C=1*6=6

H=2*6=12

O=2+1=3-->O=6(2)+6=18

6+?=18

?=12

5 0
3 years ago
Can someone please check k these to see if I have any mistakes
iren [92.7K]
I do not see any mistakes so I think you’re good!
4 0
4 years ago
Two students are given different samples of a substance and are instructed to determine the properties of the substance.
Hunter-Best [27]

The complete question is given below:

Two students are given different samples of a substance and are instructed to determine the properties of the substance.  

Which statement describes a property that will be the same for both students?

A. color because it is an extensive property

B. mass because it is an extensive property

C. boiling point because it is an intensive property

D. volume because it is an intensive property .

ANSWER

The correct option is C.

The physical properties of substances are divided into two, intensive and extensive properties.

Intensive properties refers to those features of a substance that do not depend on the quantity of the material that is available. Whether the sample available is big or small, the intensive properties remain the same. Examples of intensive properties are:  melting point, boiling point, refractive index, hardness, density color, etc. This question is asking us to look for an intensive property.

Extensive properties refers to those characteristics of a substance that depend on the amount of substance present. Examples of these properties are: mass, volume, size, weight, length, etc.

From the options given, option A is wrong because color is not an extensive property, it is intensive. Option B is wrong because the mass depend on the amount of sample given and the same thing apply to option D.

The correct option is C,  because no matter the quantity of that substance that you have, the boiling point will always remains the same.  

6 0
4 years ago
What is the shortest wavelength in the Balmer series
MissTica
The largest energy release will take place when the electron jumps between the greatest number of levels. In this case from infinity down to 2 

This is the emitted photon with the most energy ( in the Balmer series), the highest frequency and therefore the shortest wavelength. 

Balmer's original formula was 

Wavelength = 3645.6 . 10^–10 ( n^2 / (n^2 – 4) ) 

When n => infinity 

Wavelength = 3.6456 . 10^–7 m ( or 364.5 nm)
7 0
3 years ago
Read 2 more answers
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