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vladimir1956 [14]
2 years ago
9

Please answer the question circled in red

Chemistry
2 answers:
ki77a [65]2 years ago
5 0

Answer:

i need more info bro

Explanation:

Tresset [83]2 years ago
5 0
I need more information in order to help you solve the question bro.. lol otherwise I can’t be of much help.
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An atom has 18 neutrons and 17 proton. a) How many electrons are in this atom ​
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17 electron

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2 years ago
A 155g sample of an unknown substance was; heated from 25.0°c to 40°c. In the process, the substance absorbed 2085 J of energy.
Archy [21]

Answer:

0.897 J/g°C

Explanation:

Step 1:

Data obtained from the question. This includes the following:

Mass (M) of substance = 155g

Initial temperature (T1) = 25.0°C

Final temperature (T2) = 40°C

Change is temperature (ΔT) = T2 – T1 = 40°C – 25.0°C = 15°C

Heat Absorbed (Q) = 2085 J

Specific heat capacity (C) of the substance =?

Step 2:

Determination of the specify heat capacity of the substance.

Applying the equation: Q = MCΔT, the specific heat capacity of the substance can be obtained as follow:

Q = MCΔT

C = Q/MΔT

C = 2085 / (155 x 15)

C = 0.897 J/g°C

Therefore, the specific heat capacity of the substance is 0.897 J/g°C

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