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Ierofanga [76]
3 years ago
10

Is burning a physical or chemical property?

Chemistry
2 answers:
Marta_Voda [28]3 years ago
3 0
It is physical as you're not changing the chemical properties you're just changing the state
Maksim231197 [3]3 years ago
3 0
Burning is a chemical process by which a fuel is oxidised.

Take for example the burning of methane (CH4):
CH4 + 2O2 --> CO2 + 2H2O

As you can see the methane reacts with the oxygen to produce carbon dioxide and water, releasing heat in the process. The technical name is combustion.
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The density of solid aluminum is 2.70 . If a 1g peice of aluminum is dropped in a cup of water, it will . (The density of water
VMariaS [17]
Answer:
It will sink

Explanation:
The density of the water is 1 g/cm³
- Elements having less density than water will float
- Elements having more density than water will sink

We are given that the density of density of aluminum is 2.7 g/cm³ which is more than the density of the water.
Therefore, it will sink.

Hope this helps :)
4 0
3 years ago
A gas has a volume of 25.6 L at a temperature of 278 K. What will be the new temperature, in C, if
Inessa05 [86]
<h2>Hello!</h2>

The answer is: -97.37° C

<h2>Why?</h2>

According to the Charles and Gay-Lussac's Law we have that:

\frac{V}{T}=k

Where:

<em>v</em> is the volume of the gas

<em>t</em> is the temperature of the gas

<em>k </em>is the proportionality constant

From the Gay-Lussac's Law we also have the following relation:

\frac{V1}{T1}=\frac{V2}{T2}

Since we need to find the new temperature (T2) we can use the last equation:

\frac{V1}{T1}=\frac{V2}{T2}\\\\T2=\frac{V2*T1}{V1}=\frac{16.2L*278K}{25.6L}=175.92K

We are asked to find the temperature in Celsius degrees, so, we must convert the result (in K) to Celsius degrees:

Celsius=K-273.15=175.92-273.15=-97.37

So, the temperature is -97.37° C

Have a nice day!

7 0
3 years ago
An ionic bond forms between sodium chorine when the sodium atoms _______ electrons.
Natalija [7]

is 7 cus  the valance electron for sodium is Ne 3s1  and for chlorine is Ne 3s13p5

4 0
4 years ago
The use of crucible​
Norma-Jean [14]

a ceramic or metal container in which metals or other substances may be melted or subjected to very high temperatures.

"the crucible tipped and the mold filled with liquid metal"

a situation of severe trial, or in which different elements interact, leading to the creation of something new.

"their relationship was forged in the crucible of war"

3 0
3 years ago
Name a property copper has?
Ilya [14]

Answer:

Explanation:

It is malleable, ductile, and a good conductor of electricity and heat.

4 0
3 years ago
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