The given equation is already balanced. We can use the stoichiometric ratio given by the equation to find how many moles of KNO3 are produced. According to the equation, for every mole of Pb(NO3)2, 2 moles of KNO3 are produced.
It means that 194moles of KNO3 are produced.
Answer:
Galileo: "Father of Modern Science."
Aristotle: Geocentric theory." (The planests revolves around the earth.)
Torricelli: Invented the barometer. (An instrument which measures pressure.)
Copernicus: Heliocentric theory. (Aka, the planets revolves around the sun.)
Vesalius: Examined the inner workings of the human body
Newton: Developed law of universal gravitation.
Nightingale: Founded nursing profession.
Celsius: Developed metric temperature scale
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Explanation:
a. CGS system: centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time
b. SI system: metre as the unit of length, the kilogram as the unit of mass, and the second as the unit of time
Atomic radius is1.349*10-23
hcp unit cell you can see that that the spheres touch each other along
so 2rMg = a where rMg is the radius of a Mg ion and = 0.6745*10^-23
There are three levels of atoms in the hcp structure.
Six atoms form a hexagonal arrangement in the top and bottom layers, while a seventh atom sits in the centre of the hexagonal arrangement.
Three atoms in the intermediate layer are tucked away in the top and bottom plane's triangular grooves.
Mg hcp c/a = 1.635
hcp is close-packed example ABABAB etc
V = sin(60)*a*a*1.635 a
V = 1.635 *0.866*a^3
V = 1.887*a^3 cm3
Z = 2 (atoms inside unit cell)
Mass inside unit cell is = (2 * 24.305)/(6.022*10^23) = 8.071*10^-23 g
D =M/V
1.74 = 8.071*10^-23/1.887*a^3
a^3 = 8.071*10^-23/1.887*1.74 = 2.458*10^-23
a = 1.349*10^-23
Hence Atomic radius is 1.349*10^-23
Learn more about Atomic radius here
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