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3 years ago

Which step is not included in carbon cycle

Chemistry

1 answer:

DaniilM [7]3 years ago

6 0

Your answer would be Transpiration

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When can resonance structures be written for a molecule

Serga [27]

When there are pi bonds as well as the sigma bonds, and therefore a double or triple bond. When it can change where that double bond is you can draw a resonance structure. Ozone, O3, has two resonance structures because you can rearrange the bonds in it.

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4 years ago

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sukhopar [10]

Answer:

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Explanation:

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3 years ago

you teacher lit a candle and told you that this was a chemical reaction. What are the reactants in this chemical reaction

lisabon 2012 [21]

Thermal, kinetic, and light energy, I believe however you may want a second opinion.

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3 years ago

1. Why fractional distillation has<br> fractionating column but not in simple<br> distillation?

egoroff_w [7]

Answer:

<em>Fractional distillation leads to a better separation than simple distillation because the glass beads in the fractionating column provide "theoretical plates" on which the vapors can condense and then re-evaporate, and re-condense, essentially distilling the compound many times over.</em>

Explanation:

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3 years ago

Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).

pychu [463]

Answer:

26.110 grams of O2 produced.

Explanation:

Calculate the amount of moles in KClO3 by dividing the amount of grams given by the atomic weight of the substance.

To get the atomic weight: K = 39.098, Cl = 35.45, O = 15.999, and there are 3 molecules of Oxygen, so multiply 15.999 by three.

39.098 + 35.45 + (15.999 * 3) = 122.548.

66.7g / 122.548 atomic mass = 0.544 moles.

The ratio of moles of KClO3 to moles of O2 is 2 to 3.

$\frac{2}{3}$ = $\frac{0.544}{y}$

Cross multiply to get 1.632 = 2y. Y = 0.816, meaning 0.816 moles of O2 will be produced.

Convert this into grams by multiplying by the atomic weight of O2 (15.999 * 2 = 31.998).

0.816 * 31.998 = 26.110 grams of O2 produced.

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3 years ago