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matrenka [14]
2 years ago
13

Boron fluoride obeys the octet rule. True or false

Chemistry
2 answers:
FromTheMoon [43]2 years ago
8 0

Answer:

True? I think.

Explanation:

Nadya [2.5K]2 years ago
7 0

True - Boron fluoride do obey the octet rule

Explanation:

BF3 follows the octet rule because Boron has 3 electrons on its outer shell and it can give out one electron each to the 3 fluorine atoms. This gives each Fluorine ion eight electrons and Boron ends up with no electrons on the outer shell.

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How much energy is required when a 142.1 gram sample of aluminum goes from 25.5°C to 46°C? (the specific heat of aluminum is 0.9
vfiekz [6]

Answer:

2621.75 j heat is required to increase the temperature 25.5°C to 46°C.

Explanation:

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Mass of sample = 142.1 g

Initial temperature = 25.5°C

Final temperature = 46°C

Specific heat capacity of Al = 0.90 J/g.°C

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

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ΔT = 46°C - 25.5°C

ΔT = 20.5°C

Q = 142.1 × 0.90 J/g.°C × 20.5°C

Q = 2621.75 j

Thus,  2621.75 j heat is required to increase the temperature 25.5°C to 46°C.

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2 years ago
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