Iteams in house made of thermosetting plastics?

1 answer:

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Thermoplastics and thermosetting polymers Examples include: polyethylene (PS) and polyvinyl choline (PVC). Common thermoplastics range from 20,000 to 50,000 amu, while thermosets are assumed to have infinite molecular weight.

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When phenolphthalein indicator is added to a colorless solution with a pH of 10, a student observes and concludes that the teste

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Answer:

3. turns pink and is basic

Explanation:

Phenolphthalein is a pH indicator that remains colorless in acidic solutions, but in basic solutions it turns pink at a pH equal to 10.

Phenolphthalein is a weak acid that loses H+ cations in solution. The phenolphthalein molecule is colorless, while the phenolphthalein-derived anion is pink. When a base is added, phenolphthalein loses H+, forming the anion and causing it to turn pink. The color change cannot be explained only on the basis of deprotonation, a structural change occurs with the appearance of a ketoenolic tautomerism.

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C. Model. It's a graphical model that displays one or more weather elements.

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Write the chemical equation for the following word equations. Include symbols for physical states in the equation.a. solid zinc

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Answer:

ZnS(s) + O2(g) → ZnO(s) + SO2(g)

HCl (aq) + Ba(OH)2(aq) → BaCl2(aq) + H2O

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Below are the reduction half reactions for chemolithoautotrophic nitrification, where ammonia is a source of electrons and energ

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Answer: The molecules of oxygen gas that will be reduced to water are 42 molecules

Explanation:

We are given:

$E^o_{(NO_2^-/NH_4)}=-0.41V\\E^o_{(O_2/H_2O)}=0.82V$

The substance having highest positive $E^o$ potential will always get reduced and will undergo reduction reaction. Here, oxygen will undergo reduction reaction will get reduced.