Which statement is the best description of a chemical reaction?
mixing two substances
f...
Chemistry, 16.10.2020 09:01 gabbym39077
Which statement is the best description of a chemical reaction?
mixing two substances
forming or breaking bonds
the combustion of a substance
the decomposition of particles
Answers: 2
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As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit
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At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.
Answers: 1
Chemistry, 23.06.2019 05:40
Why is it incorrect to balance a chemical equation by changing the subscripts? explain.
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Match the vocabulary terms to their definitions. 1 . a long, chain-like set of molecules made up of repeating units joined end to end polymer 2 . a hard, brittle, heat- and corrosion-resistant material made by subjecting a nonmetallic mineral mixture to intense heat ceramic 3 . a plastic with low elongations that cannot be recycled thermoset 4 . a carbon fiber embedded in a polymer resin matrix thermoplastic 5 . a plastic with high elongations that can be recycled crystal 6 . a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns composite
Answers: 1
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