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alex41 [277]
3 years ago
14

- Which of the following is an example of physical change?

Chemistry
1 answer:
dalvyx [7]3 years ago
5 0
B as the glass just changes form as it shattered but the chemical composition is same as it was before
You might be interested in
Acids
Marizza181 [45]

-Acids release hydrogen ions

-Acids taste sharp

-Some Acids can cause serious burns

The answer is "All of the above"

<em />

<em>Hope this helps! Please mark brainliest!!!</em>

6 0
2 years ago
What mass of natural gas (CH4) must you burn to emit 264 kJ of heat?
mariarad [96]
The heat released by cpmolete the combustion of organic products with oxygen is called heat of combustion.

Here 1 mol of CH4 realesed 802.3 KJ

To emit 264 kJ you multiply you need (1 mol of CH4/802.3 kJ)* 264 kJ = 0.329 mol of CH4

The molar mass, MM, of CH4 is 12 g/mol + 4*1g/mol = 16 g/mol

The to obtain the mass multiply the number of moles times the molar mass:

mass = n * MM = 0.329mol * 16g/mol = 5.26 grams

Answer: 5.26 grams



7 0
3 years ago
The melting point of copper is 1084 Celsius. How does the energy of the particles in a certain amount of liquid copper compare t
matrenka [14]
The melting point of the solid form of water, which is ice, is 0°C. When we convert both temperatures to kelvin by adding 273 to each we get the melting point of copper as 1357K and that of ice is 273K. Then, dividing the melting point of copper by the melting point of ice, both in absolute temperature scale. The answer would be 4.97. Thus, the energy of molecules of copper is approximately {five} times compared to that of water
4 0
3 years ago
What are properties of the group of elements on the periodic table that have just one valence electron
Valentin [98]
<span>The correct answer is, Alkali Metals</span>
7 0
3 years ago
A man went to a gas station and asked the attendant to inflate the low front tire. When the attendant finished, the constant(s)
OLga [1]
None of above. only temperature stays constant.
5 0
3 years ago
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