WebWorksheet Answers: Physical and Chemical Changes. Example #1: Label each process as a physical or chemical change: (a) perfume evaporating on your skin - physical (b) butter melting - physical (c) wood rotting - chemical (d) charcoal heating a grill - see below (e) autumn leaves changing color - chemical (f) a hot glass cracking when placed in cold … WebA two-fluid algorithm utilizing 50% dextrose and water was sufficient to distinguish the sample types. Camphor will float in water while both paradichlorobenzene and naphthalene will sink. In 50% dextrose, both naphthalene and camphor will float while paradichlorobenzene will sink. Conclusion: Mothball materials can be distinguished by ...
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Web2. Examine the different substances given: A. Moth Balls Chemical Composition: N aphthalene (C10H8) Mechanism of Toxicity: The mechanism of toxicity of naphthalene involves its bioactivation by cytochrome P450 enzymes, inducing acute cytotoxicity through repeated cycles of injury and repair and causing damage in multiple organs, including the … WebOct 17, 2013 · That is a physical change because the evaporated moth ball chemical is still the moth ball chemical, just in a different form. It's similar to water . . . water is water no matter if it is solid ... blink camera system account
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WebSep 19, 2024 · Naphthalene, the active ingredient in one variety of mothballs, is an organic compound that contains carbon and hydrogen only. Complete combustion of a 20.10 mg sample of naphthalene in oxygen yielded 69.00 mg of CO 2 and 11.30 mg of H 2 O. Determine the empirical formula of naphthalene. WebJan 11, 2024 · Formula & Structure. The chemical (molecular) formula of naphthalene is pretty easy to remember. It's simply: C 10 H 8. The C stands for carbon and the H stands for hydrogen. As such, naphthalene ... WebAug 1, 2024 · Why Are Mothballs Harmful? The mothballs are considered harmful due to their chemical composition. These solid balls have a chemical compound that … blink cameras work with ring