Mercury is a chemical element with the symbol Hg and atomic number 80. The electron configuration of Hg is 6s2 4f14 5d10.
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How to write an electronic configuration?</h3>
1. Identify the given element and its atomic number from the periodic table.
2. Write the electron configuration by the energy level and the type of orbital first, then the number of electrons present in the orbital as superscript.
The easiest way to write the electronic configuration for any element is by using a diagonal rule for electron filling order in the different subshells according to the Aufbau principle.
The 3 rules for writing the electron configuration in the orbital box diagram are – the Aufbau rule, the Pauli-exclusion rule, and Hund's Rule.
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In my point of view, the simple thing to do here is just to exchange the 3+ and the 2- and you will get:
Al2(CO3)3
The logic behind this is that when you have 2 Al^3+, it makes an overall charge of 6+. Additionally, when you have 3 CO^2-, it also makes an overall charge of 6- (because 3 X 2 = 6). Therefore, 6+ and 6- "cancelled" out, and you will have a neutral charge compound.
I hope you understand
The molar mass of vanadinite is 1416.27 g/mol. Looking at
the molecular formula we can see that there is 1 mole of Cl for every mole of
vanadinite. Therefore:
mass percent = [(1 mole Cl * 35.45 g/mol) / (1 mole
Pb5(VO4)3Cl * 1416.27 g/mol)] * 100%
<span>mass percent = 2.50%</span>
Answer:
1,100 Joules of heat is released when 50.0 g of ethanol cools from 90 °C to 79 °C.
Explanation:
Mass of an ethanol = 50.0 g
Specific heat capacity of the ethanol vapor's = c = 2.0 J/g°C
Initial temperature of the ethanol vapors = 90 °C
Final temperature of the ethanol vapors = 79°C
Heat released on cooling of ethanol vapors = Q
Negative sign indicates that the heat is released into the surroundings.
1,100 Joules of heat is released when 50.0 g of ethanol cools from 90 °C to 79 °C.