3 years ago

____ can be found in many forms including in the chemicals found in food

Chemistry

1 answer:

Rzqust [24]3 years ago

4 0

A. Chemical energy can be in many forms including in the chemicals found in food

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Round to 2 significant numbers, 5239

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Answer:

Explanation:

Two sig digits means that 5239 becomes 52 with some zeros behind it. How many?

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3 years ago

If the energy difference between two electronic states is 214.68 kJ / mol , calculate the frequency of light emitted when an ele

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${\qquad\qquad\huge\underline{{\sf Answer}}}$

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Energy difference btween the two electronic states can be expressed as :

${ \qquad \sf \dashrightarrow \: \Delta E = h\nu}$

[ h = planks constant, ${\: \nu }$ = frequency ]

$\qquad \sf \dashrightarrow \:214.68 = 39.79 \times 10 {}^{ - 14} \times \nu$

$\qquad \sf \dashrightarrow \: \nu = \cfrac{214.68}{39.79 \times 10 {}^{ - 4} }$

$\qquad \sf \dashrightarrow \: \nu = \cfrac{214.68}{39.79 } \times 10 {}^{14}$

$\qquad \sf \dashrightarrow \: \nu \approx 5.395 \times10 {}^{14} \:\:hertz$

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2 years ago

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