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Dmitry [639]
3 years ago
11

Must new substances be formed when you observe a chemical property explain

Chemistry
1 answer:
GaryK [48]3 years ago
5 0
No but a chemical change yes a chemical property is only a characteristic not change
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What are the steps of natural selection?
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☆anvipatel77☆

•Expert•

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5 0
2 years ago
The principle quantum number (n) describes what
slega [8]

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the energy of an electron and the most probable distance of the electron from the nucleus.

Explanation:

The principal quantum number, n, describes the energy of an electron and the most probable distance of the electron from the nucleus. In other words, it refers to the size of the orbital and the energy level an electron is placed in. The number of subshells, or l, describes the shape of the orbital.

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3 years ago
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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



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I really need helpppppppp
stich3 [128]
4, 2, 3,1

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