The kind of seismic waves travel through the earth are Congressional longitudinal waves and shear transverse waves.
Explanation:
- There are two kinds of seismic waves and they are the Congressional longitudinal waves and shear transverse waves.
- They are called the P waves and S waves when they pass through the earth.
- P waves are the primary because they are the fastest waves whereas S waves are the secondary since they are slower
- P waves move as alternate compressions and dilations along the side of propagation
- S waves move as alternate compression and transverse motion along the perpendicular side of propagation.
To know if the solutions are isotonic, hypertonic or hypotonic, we have to determine the osmotic pressure of each solution.
P = iMRT
where
i is the number of ions dissociated for strong electrolytes
M is the molarity
R is the universal gas constant
T is the absolute temperature
For 0.15 M CaCl₂, i = 3 (1 for Ca⁺ and 2 for Cl⁻).
P = (3)(0.15)RT= 0.45RT
For 0.15 NaCl, i = 2 (1 for Na⁺ and 1 for Cl⁻).
P = 2(0.15)RT = 0.3RT
Therefore, the P for CaCl₂ is GREATER than the P for NaCl. <em>Hence, the CaCl₂ solution is hypertonic.</em>
Answer:
B. using zinc metal strips that were cut in half and a 20% hydrochloric acid solution D. using zinc metal strips that were cut in eighths and a 20% hydrochloric acid solution Explanation:
i'am not sure its either one of those two
Answer:
Rate constant = 0.0237 M-1 s-1, Order = Second order
Explanation:
In this problem, it can be observed that as the concentration decreases, the half life increases. This means the concentration of the reactant is inversely proportional to the half life.
The order of reaction that exhibit this relationship is the second order of reaction.
In the second order of reaction, the relationship between rate constant and half life is given as;
t1/2 = 1 / k[A]o
Where;
k = rate constant
[A]o = Initial concentration
k = 1 / t1/2 [A]
Uisng the following values;
k = ?
t1/2 = 113
[A]o = 0.372M
k = 1 / (113)(0.372)
k = 1 / 42.036 = 0.0237 M-1 s-1
The reducing agent is donating electrons and therefore becoming oxidised itself. In this scenario elemental zinc (Zn) is in a reduced state and is oxidised to become Zn2+, in doing so it donates electrons to Fe2+, thereby reducing it to elemental iron (Fe).
The elemental Zinc in solid state is therefore the reducing agent as it reduces Fe2+ to Fe(s).