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6.02x10^23; This represents the number of molecules in 1 mole of a substance.
a. 2Na Al 03
Equation must have the same number of each element on both sides of the equation.
Answer:
Density, d = 1.779 g/cm³
Explanation:
The density of a material is given by its mass per unit volume.
Here, height of a piece of magnesium cylinder, h = 5.62 cm
Its diameter, d = 1.34 cm
Radius = 0.67 cm
Volume of he cylinder,


So, the density of the sample is 1.779 g/cm³.