Answer: The correct answer is the option: B. An element with eight valence electrons is chemically unstable.
Explanation:
Hello! Let's solve this!
We will analyze each of the options:
A. The group number of the element provides a clue to the number of valence electrons: it is correct, since it provides the number of valence electrons.
B. An element with eight valence electrons is chemically unstable: this is not correct, since elements with eight electrons in the valence shell cannot react because they already have the last complete shell. Therefore, they are chemically stable.
C. The points must be placed one at a time on each side of the chemical symbol: it is correct, because that is the way to make the point diagram.
D. An atom is chemically stable if all the points are paired: this is correct since this verifies that the point diagram has been done well.
We conclude that the correct answer is the option: B. An element with eight valence electrons is chemically unstable.
Hope this helps..... Stay safe and have a Merry Christmas!!!!!!!!! :D
Answer:
Heat flux = 13.92 W/m2
Rate of heat transfer throug the 3m x 3m sheet = 125.28 W
The thermal resistance of the 3x3m sheet is 0.0958 K/W
Explanation:
The rate of heat transfer through a 3m x 3m sheet of insulation can be calculated as:
The heat flux can be defined as the amount of heat flow by unit of area.
Using the previous calculation, we can estimate the heat flux:
It can also be calculated as:
The thermal resistance can be expressed as
For the 3m x 3m sheet, the thermal resistance is
Explanation:
Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
Source: https://en.m.wikipedia.org/wiki/Decantation
The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth's mantle below the crust. Earthquakes and volcanoes are the short-term results of this tectonicmovement. The long-term result of plate tectonics is the movement of entire continents over millions of years
Answer:
0.93956kg
Explanation:
Equation for the reaction is given as;
P4 + 5O2 --> P4O10
From the equation, 1 mole of P4 produces 1 mole of P4O10.
Mass = Number of moles * molar mass
Mass of P4 = 1 mol * 123.88 g/mol = 123.88 grams
Mass of P410 = 1 mol * 283.886 g/mol = 283.886 g
This means 123.88 grams of P4 produced 283.886 g of P4O10.
How many kilograms of P4O10 would be produced from 410. g of pure P4 ?
123.88 = 283.886
410 = x
x = (410 * 283.886 ) / 123.88
x = 939.56g
Upon converting to Kilogram by dividing by 1000
x = 0.93956kg
