3 years ago

Octane has a higher boiling point than pentane because _____.

1 answer:

6 0

Octane has a higher boiling point than pentane because it contains a higher amount of atoms specifically carbon than the number of propane found on it. You can find a large number of London dispersion which is attractive forces than butane.

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What is the full meaning of DR.HERC.

n200080 [17]

Answer:

It is

D- DEFINE the problem

R-RESEARCH on the problem

H- Carry out a HYPOTHESIS

E- carry out an EXPERIMENT.

R-Analyse the RESULT

C-summarise the CONCLUSION.

Explanation:

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Which would be a biotic factor in an ecosystem? 1)air 2)rain 3)algae

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Air and rain are very important

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Atoms contain positive, negative, and neutral. what happens when two positively charged particles are close together?

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Answer:

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Explanation:

A is the ans

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A first order reaction has a rate constant of 0.543 at 25 c and 6.47 at 47

alukav5142 [94]

The activation energy Ea can be related to rate constant (k) at temperature (T) through the equation:

ln(k2/k1) = Ea/R[1/T1 - 1/T2]

where :

k1 is the rate constant at temperature T1

k2 is the rate constant at temperature T2

R = gas constant = 8.314 J/K-mol

Given data:

k1 = 0.543 s-1; T1 = 25 C = 25+273 = 298 K

k2 = 6.47 s-1; T = 47 C = 47+273 = 320 K

ln(6.47/0.543) = Ea/8.314 [1/298 - 1/320]

2.478 = 2.774 *10^-5 Ea

Ea = 0.8934*10^5 J = 89.3 kJ

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The wavelength of a given region of the electromagnetic spectrum ranges from 1 x 10-11 - 1 x 10-8 meters. Which waves are found

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The electromagnetic spectrum consists of the full range of known electromagnetic waves. And among them, X-rays has the wavelength of the region 1*10-11 to 1*10-8 meters.

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