Hey there !
<span>Convert Joule to KJ :
</span>
1 j ---------------- 0.001 kj
53.69 j ----------- Kj
Kj = 53.69 * 0.001
=> 0.05369 Kj
T = ΔH / <span>ΔS
T = 49.09 / 0.05369
T = 914.32ºC</span>
To illustrate the Lewis structure,
P has 5 valence electrons
O has 6 valence electrons (each for 4 oxygen)
And finally, for every negative charge, there is an additional valence electron
We should add these all up = 5 + 24 + 3 = 32 valence electrons
With this, we can be guided to illustrate the lewis structure as P as central atom and the 3 oxygen each with a single bond with P and 1 oxygen with a double bond with P. We place the valence electrons until octet rule is satisfied,
we will be left with 12 lone pairs for phosphate ion.
It's D, all of the claims are true about oxidation reactions :)
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:
C
Explanation:
A Is false because physical properties can relate to any chemical substance.
B Is false because physical properties are apparent wether a chemical change has occurred or not.
C Is correct because physical properties can be observed without making a chemical change to the substance, chemical properties cause physical properties but a chemical change is not needed to observe a physical property.
D Physical properties describe compounds in all phases of matter.