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cluponka [151]
3 years ago
6

Which would be expected to have a higher boiling point t-butyl alcohol or n-butyl alcohol?

Chemistry
1 answer:
patriot [66]3 years ago
4 0
T-butyl alcohol boiling point 82.4*C, 356 K, 180*F
N-butyl alcohol boiling point 117.2*C 

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A box has dimensions 0.2 mx 0.4 m x 0.6 m. What is the
AnnyKZ [126]

Answer:

V=0.048m^3

Explanation:

Hello,

In this case, since the volume is computed by multiplying the given dimensions as follows:

V=0.2m*0.4m*0.6m

The result is shown in cubic meters since each meter is also added:

V=0.048m^3

Best regards.

5 0
3 years ago
A watt is a unit of power or energy per unit time (1 W = 1 J/s). A semiconductor laser in a CD player has an output wavelength o
GREYUIT [131]

Answer:

n = 2.208x10¹⁸ photons

Explanation:

The energy of a photon( an elementary particle) is given by the equation:

E = nxhxf

Where n is the number of photons, h is plank constant (6,62x10⁻³⁴ J.s), and f is the frequency. Knowing that the power level is 0.120mW (1.2x10⁻⁴ W), the energy in J, for a time of 78 min (4680 s)

E = 1.2x10⁻⁴x4680 = 0.5616 J

The frequency of a photon is its velocity ( c= 3x10⁸ m/s) divided by its wavelength, which is 780 nm = 780x10⁻⁹ m

f = 3x10⁸/780x10⁻⁹

f = 3.846x10¹⁴ s⁻¹

Then, the number of photons is:

0.5616 = nx6,62x10⁻³⁴x3.846x10¹⁴

n = 2.208x10¹⁸ photons.

5 0
3 years ago
Which of the following is a metal?
kogti [31]

Answer:

A.................. I think the answer

3 0
3 years ago
" what is the total positive charge the protons have together ? " how do I tell?? Please help!!!
zzz [600]
To calculate this, the first step is to determine the number of protons in each atom of the ion. You can use their atomic number to find the number of protons. If the number protons and electrons are equal there is no charge, so the next step is to determine how many electrons to add or remove to the number of protons.
8 0
4 years ago
(b) Ozone absorbs radiation of wavelengths 2200–2900 Å, thus protecting organisms from this radiation. Find the frequency and en
GrogVix [38]

The frequency and energy of most energetic of these photons is1.36*10^{15} Hz and 9.04*10^{-19} J respectively.

The high energy photons will have least wavelength. Taking the given less wavelength for calculation of frequency and energy of photons.

λ = 2200  Å

Also, we know, 1 Å = 10^{-10} m

So, λ = 2200*10^{-10}

λ = 2.2*10^{-7}<em> </em>m

Now, calculating frequency using the formula -

c = fλ, where c is speed of light, f is frequency and λ is wavelength.

We know, c = 3*10^{8} m/s

f = c/λ

f = \frac{3*10^{8} }{2.2*10^{-7} }

frequency = 1.36*10^{15} Hz

Now, calculating Energy through the formula -

E = hf, where E is energy, h is planck's constant and f is frequency

Value of planck's constant = 6.63*10^{-34} Js

E = 6.63*10^{-34}*1.36*10^{15}

Energy = 9.04*10^{-19} J

Thus, frequency and energy of photons is 1.36*10^{15} Hz and 9.04*10^{-19} J respectively.

Learn more about energy of photon -

brainly.com/question/15946945

#SPJ4

3 0
1 year ago
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