Given:
m = 3 x 10³⁶ kg, the mass of the star
r = 7.6 x 10⁵ km = 7.6 x 10⁸ m
Calculate the volume of the star (as the volume of a sold sphere).
Calculate the density the star.
By definition, the density of the star is
In g/cm³, the density is
Answer: 1.6315 x 10⁶ g/cm³
Answer: Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume.
Explanation:
pretty self explanitory. (jk i googled it)
Answer:
0.80 seconds (2 significant figures)
Explanation:
The equation of the reaction is given as;
CICH2CH2Cl (g) --> CH2CHCI (g) + HCl(g)
Rate constant (k) = 2.01 s^-1
From the units of the rate constant, this is a first order reaction.
Initial Concentration = 1.34 M
t = ?
Final concentration = 20% of 1.34 = 0.268 M
The integrated rate law for a first order reaction is given as;
ln[A] = ln[A]o - kt
ln(0.268) = ln(1.34) - 2.01(t)
-2.01(t) = - 1.6094
t = 0.8007 ≈ 0.80 seconds (2 significant figures)