3 L'eau oxygénée
L'eau oxygénée est un liquide incolore utilisé comme
antiseptique et agent de...
Chemistry, 27.05.2021 09:00 idk314159265359
3 L'eau oxygénée
L'eau oxygénée est un liquide incolore utilisé comme
antiseptique et agent de blanchiment. L'eau oxygénée
peut subir une transformation chimique qui est à l'ori-
gine de son nom : elle se décompose en eau liquide et en
dioxygène gazeux,
1. Identifier le réactif et les produits de cette transforma-
tion chimique
2. Comment va-t-elle se manifester ?
Answers: 2
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Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.
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Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.
Answers: 2
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