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2 years ago

HELP ASAP PLEASE I'LL GIVE BRAINLIEST

Chemistry

2 answers:

Furkat [3]2 years ago

8 0

Answer:

Radiowave,Microwave, Infared,UV,X-Ray, Gamma

Reptile [31]2 years ago

5 0

radio,microwave, ultraviolet,x ray,gamma ray

Explanation:

I looked it up at a NASA link

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Which historical era was marked the beginnings of European explorations, conquests of the Americas, trans-Atlantic slave trade a

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Answer : Option C) Early modern era

Explanation : The historical era which was marked by the beginnings of European explorations, conquests of the Americas, trans-Atlantic slave trade and the rise of a globally intertwined economy was Early modern era. It was later followed by the medieval period.

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2 years ago

The reaction C 4 H 8 ( g ) ⟶ 2 C 2 H 4 ( g ) C4H8(g)⟶2C2H4(g) has an activation energy of 262 kJ / mol. 262 kJ/mol. At 600.0 K,

ludmilkaskok [199]

Answer: $4.3\times 10^{-13}s^{-1}$

Explanation:

According to the Arrhenius equation,

$K=A\times e^{\frac{-Ea}{RT}}$

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$\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]$

where,

$K_1$ = rate constant at $600.0K$ = $6.1\times 10^{-8}s^{-1}$

$K_2$ = rate constant at $775.0$ = $?$

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R = gas constant = 8.314 J/mole.K

$T_1$ = initial temperature = $600.0K$

$T_2$ = final temperature = $775.0K$

Now put all the given values in this formula, we get

$\log (\frac{6.1\times 10^{-8}}{K_2})=\frac{262000}{2.303\times 8.314J/mole.K}[\frac{1}{600.0K}-\frac{1}{775.0K}]$

$\log (\frac{6.1\times 10^{-8}s^}{K_2})=5.150$

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Therefore, the value of the rate constant at 775.0 K is $4.3\times 10^{-13}s^{-1}$

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1 year ago

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Juliette [100K]

Answer:

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Explanation:

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