Explanation:
The given data is as follows.
V = 0.389 L = 0.389 kg
m = 389 g of water (as 1 kg = 1000 g)
wavelength = 12.9 cm
dT =
First, we will identify the heat absorbed as follows.
Q =
Putting the given values into the above formula as follows.
Q =
Q =
= 128090.231 J
Now, as we know that
Energy (E) =
or,
where, h = Planck's Constant = J s
c = speed of particle (i.e. light) = m/s
E = energy per particle J/photon
Hence, calculate the energy as follows.
E =
(As 1 m = 100 cm)
= J/photons
Hence, number of photons present will be calculated as follows.
n photons =
=
=
=
Thus, we can conclude that number of photons released are .
Answer: maybe a choking hazard for the ones with wires
Explanation:
What happens when chlorine form an ion is that it gains an electron and has an octet in its outer shell ( answer A)
<u><em> Explanation</em></u>
<u><em> </em></u>Chlorine is is in atomic number 17 in periodic table.
The electron configuration of chlorine is 1S2 2S2 2P6 3S2 3P5 or[Ne]3S2 3p5 or 2.8.7.
chlorine therefore has 7 valence electron therefore it gain 1 electron to form Cl- ( ion)
Cl- has 8 electron in its outer shell ( it obeys octet rule of eight valence in outer shell.
Answer: FALSE
Explanation: Magnesium is more reactive.
Hope this helps!
The question is incomplete, the complete question is:
A chemist measures the amount of iodine solid produced during an experiment. He finds that 8.31 g of iodine solid is produced. Calculate the number of moles of iodine solid produced. Round your answer to the correct number of significant digits.
<u>Answer: </u>The number of moles of solid iodine produced is 0.0327 moles
<u>Explanation:</u>
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
......(1)
Given mass of solid iodine = 8.31 g
Molar mass of solid iodine = 253.8089 g/mol
Plugging values in equation 1:
Hence, the number of moles of solid iodine produced is 0.0327 moles