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KATRIN_1 [288]
2 years ago
6

Classify each of the following as an element a compound or a mixture ​

Chemistry
1 answer:
Soloha48 [4]2 years ago
6 0
Is there something else that goes along with the question?
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Energy from a reaction was determined to be 3870 J using a water calorimeter, when burning 9.00 grams of H­2. What is the total
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Answer:

860 J / mol

Explanation:

Enthalpy = Energy / no. of moles

no. of moles = mass / molar mass

Take the atomic mass of H = 1.0,

molar mass of H2 = 1.0 x 2

= 2.0

no. of moles of H2 = 9.00/2

= 4.5 mol

Hence,

Enthalpy = 3870 / 4.5

=860 J / mol

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3 years ago
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Explanation:

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