Answer:
100 times more acidic.
Explanation:
If you look at the pH scale, pH2 is 2 "jumps" away from pH4, therefore, pH2 is 100x more acidic than pH4.
Answer:
Kinetic energy is the energy of motion so to figure out that it’s not changing is if the object is still moving. If it’s staying still or is at rest, it is presenting potential energy, which is when energy is being stored inside the object.
<span>The
correct answer is A. cloud of gases that forms around the nucleus of a comet is
called a coma. The coma is a dusty, fuzzy cloud around the nucleus of a comet.
Other parts of a comet are the nucleus and the tail.</span>
Answer:
E = +1.430 V
Explanation:
The given cell reaction is written as:
2VO²⁺(aq) + 4H⁺(aq) + Fe(s)---> 2VO₂⁺(aq) + 2H₂O(l) + Fe²⁺(aq)
E⁰cell = E⁰_{VO₂/Vo₂⁺} - E⁰_{Fe²⁺/Fe}
= + 1.00 - ( - 0.447) = + 1.45 V
From Nernst equation...
E = E⁰cell - (RT/nF) lnQ
where, Q = [products]/[reactants]
= [Fe²⁺][VO₂⁺]²/[VO²⁺]²[H⁺]⁴
Q= (6.55*5.56)/(2.22*3.55)
= 36.418/7.881
= 4.621
T = 25 + 273 = 298K
at 298K the above equation could also be written as...
E = E⁰cell - (0.0592/n) log Q
n is number of electrons transferred and it is 2. Let's plug in the values...
E = 1.45 - (0.0592/2) log 4.621
E = 1.45 – (-0.01968)
E = +1.430 V
Elements which composed of an equal amount of three components protons, neutrons and electrons are considered neutral elements. example of neutral elements are hydrogen, helium, lithium and beryllium...