Which are the MOST LIKELY products of the reaction between sodium metal and chlorine gas?
1 answer:
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Explanation:
The given data is as follows.
Thickness = 0.28 mm = cm = 0.028 cm
Area = 0.40 =
= 4000
As, it is known that volume = area × thickness
So, Volume =
= 112
As density is mass divided by volume. So, mass of chromium will be calculated as follows.
Density =
7.20 =
mass = 806.4 g
As, mass of 1 mole of chromium is 52 g. So, number of moles in 806.4 g of chromium will be as follows.
No. of moles =
=
= 15.50 mol
In chromate ion, () charge on Cr is +6. It means that 6 electrons are needed to reduce
into Cr.
As, 1 mole of ions require 6 moles of electrons. Therefore, moles of electrons for 15.50 mol will be calculated as follows.
6 × 15.50 mol = 93.04 mol
To calculate number of electrons we multiply number of moles by Avogadro's number as follows.
=
= electrons
There is magnitude of times the charge on an electron is equal to 1 coulomb.
Hence, number of coulombs will be as follows.
No. of coulombs =
= C
or, = C
Thus, we can conclude that C are required to plate a layer of chromium metal with given data.
Explanation:
Molecular formulas show correct and accurate number of each type of the atoms which are present in molecule.
On the other hand, structural formulas show arrangement of atoms and covalent bonds between them.
For example,
The molecular formula for carbon dioxide is
The structural formula is O = C = O