Which change is the best example of a physical change?
1) a cookie baking
2) a pa...
Chemistry, 15.10.2019 20:30 saraaaalynn19061
Which change is the best example of a physical change?
1) a cookie baking
2) a paper burning
3) ice cream melting
4) a nail rusting
i need on this fast, thx!
Answers: 2
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Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules
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Areaction in which products can react to re-form reactants is
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Chemistry, 22.06.2019 20:30
The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?
Answers: 3
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