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Butoxors [25]
3 years ago
6

Which of the following is not an indication of a chemical change? A.fracture formation. B.energy transfer. C.precipitate formati

on. D.gas production
Chemistry
2 answers:
julsineya [31]3 years ago
4 0

In chemistry, there are two types of change, they are chemical and physical changes. A chemical change is one in which new substance are formed and it is always irreversible while a physical change is one in which no new substance is formed and it is always reversible. There are many factors that can indicate that a chemical change has taken place, these include: energy transfer, formation of precipitation, gas production, etc. Fracture formation does not indicate chemical change. In fracture formation nothing changes, so it is a form of physical change.

irakobra [83]3 years ago
4 0
Fracture formation is a physical change and no chemical change occur in it
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5 0
3 years ago
An unknown mass of aluminum requires 6290 joules to raise
Alex Ar [27]

Answer:

124.579 g

Explanation:

Amount of heat required to change the temperature of body is given by the equation given below

Q = m* c * ΔT ____________________equation A

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______________________________________

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K = C + 273

initial temperature  = 23.9°C

initial temperature on kelvin scale =  23.9° + 273 = 296.9

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initial temperature on kelvin scale =  80° + 273 = 353

ΔT(temperature difference) = 353 - 296.9 = 56.1

___________________________________________

let the mass of of the  aluminum be m g

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=> m = 124.579 g

The mass of the  aluminum is 124.579 g

8 0
3 years ago
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