To get the molecules contained in liquid ethanol, we multiply the density to the given volume, that is equal to 0.789 g ethanol. In this case, we divide by molar mass and multiply by the constant, Avogadro's number. The answer is 1.033 x 10^22 molecules.
Answer:
Density = 7.87 grams per mL
Explanation:
Density is given by the formula:
where
Z = effective number of atoms in one unit cell.
M = Molecular mass of the substance
a = edge length of unit cell
Na = Avogadro number = 6.022×10²³
In this case:
Z=2 as it is body-centered type unit cell
M = 56 g per mole for iron
a = 287 pm = 
Substituting the above values in the density formula we get:
Density of iron is 7.87 grams per mL.
Some chemical changes can be reactive through another chemical change?
Explanation:
According to Newton law of gravity, the strength of gravitational pull between two objects is related to their masses, directly, and inversely by the distance between them;
F = G * (M₂ – M₁) / d where;
F – the force of gravity
G – gravitational constant
M₂ – the mass of one object
M₁ – the mass of the other object
d – the distance between the two objects
The rocky planets have a higher mass than the gas planets hence will be strongly ‘feel’ the gravitational pull of the star in the solar system revolves about. This is why rocky planets are closer to their star while gas planets are towards the outer edges.
Learn More:
For more on gravity check out;
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