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muminat
3 years ago
7

How can you determine if a reacition is exothermic?

Chemistry
1 answer:
Marizza181 [45]3 years ago
3 0
Exothermic reaction normally gives out heat for completing the reaction. the burning of a candle or the condensation of water vapour to water are all exothermic reactions. The prefix "ex" at the begining refers to external or outside and normally these kind of reactions release heat at the end.During neutralization, when the acida and bases are combined, it releases heat and this kind of reaction is definitely exothermic reaction.The combustion of any kind of fuel is also exothermic reaction as it gives out heat at the end.Fossil fuel burnt in cars and engines are good examples.
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Which statement best describes the properties of covalent compounds?
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3 years ago
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A balloon is filled with 35.0 L of helium in the morning when the temperature is 35.00 oC.
nexus9112 [7]

Answer: V = 33.9 L

Explanation: We will use Charles Law to solve for the new volume.

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3 years ago
A compound is 80.0% carbon and 20.0% hydrogen by mass. assume you have a 100.-g sample of this compound. the molar mass of the c
ch4aika [34]
Basis of the calculation: 100g
 
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For Hydrogen:
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Translating the answer to the formula of the substance,
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Dividing the answer,
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The molar mass of the empirical formula is:
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Since, the molar mass given for the molecular formula is 30.069 g/mol, the molecular equation is,
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ANSWER: C2H6

 
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3 years ago
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6 0
2 years ago
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