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Temka [501]
4 years ago
10

Which of the following phrases best describes a synthesis reaction?

Chemistry
1 answer:
iogann1982 [59]4 years ago
4 0
Answer is D breaking apart I to not more than two
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The longest wavelength of light with enough energy to break the Cl-Cl bond in Cl2(g) is 495 nm.
Katen [24]

Explanation:

The longest wavelength of light with enough energy to break the Cl-Cl bond = 495 nm = 495\times 10^{-9} m

1) The frequency of the light:

\lambda =495\times 10^{-9} m

\nu=\frac{c}{\lambda }

c = speed of light= 3\times 10^8 m/s

\nu=\frac{3\times 10^8 m/s}{495\times 10^{-9} m}

=6.0606\times 10^{14) s^{-1}

The frequency of the light is 6.0606\times 10^{14) s^{-1}.

2)The energy of a photon of the light:

The energy of the photon is given by : E

E=h\nu

h =  Planck's constant = 6.626\times 10^{-34} J/s

E=6.626\times 10^{-34} J/s\times 6.0606\times 10^{14) s^{-1}

=4.016\times 10^{-19} J

The energy of a photon of the light is 4.016\times 10^{-19} J.

3) The minimum energy of the Cl-Cl bond :

To break single bond of Cl-Cl bond we need energy E= 4.016\times 10^{-19} J

1 mole = N_A=6.022\times 10^{23} mol^{-1}

So, in order to break 1 mole of Cl-Cl bond we will need:

E\times N_A=4.016\times 10^{-19} J\times 6.022\times 10^{23} mol^{-1}

=241,828.92 J/mol=241,828.92\times 0.001 kJ/mol=241.83 kJ/mol

The minimum energy of the Cl-Cl bond is 241.83 kJ/mol.

3 0
3 years ago
In the process of nuclear fission,1(_____).Fission only happens to very 2(_____) atoms.The Fission process usually also produces
vovikov84 [41]

Answer:

1. One atom splits

2. large

3. neutrons

Explanation:

In the process of nuclear fission,1__one atom splits___.Fission only happens to very 2(__large___) atoms.The Fission process usually also produces several free 3(__neutrons___).

Nuclear fission is a radioactive decay process in which heavy and unstable radioactive nucleus decays into lighter ones with the release of energy and free neutrons.

Fission differs from fusion in that in nuclear fusion, two light atoms comes together to form a large one. This process releases a very great amount of energy.

3 0
3 years ago
Read 2 more answers
When a theory is disproved by further evidence, which of the following occurs?
morpeh [17]
Number 2 is the correct answer
3 0
3 years ago
Read 2 more answers
In which of the following locations are bacteria often found?
djyliett [7]

Answer:  

in the air and soil  

in drinking water

on and inside the human body

Explanation: Hope that helps

7 0
3 years ago
How can we prevent land pollution?​
Dominik [7]

Answer:

1. Make people aware about the concept of Reduce, Recycle and Reuse.

2. Reduce the use of pesticides and fertilizers in agricultural activities.

3. Avoid buying packages items as they will lead to garbage and end up in landfill site.

4. Ensure that you do not litter on the ground and do proper disposal of garbage.

5. Buy biodegradable products.

6. Do organic gardening and eat organic food that will be grown without the use of pesticides.

7. Create dumping ground away from residential areas.

I hope it helps u

7 0
2 years ago
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