Answer:
Explanation:
Given that,
The speed of light is 3×10⁸ m/s
We need to convert it into mi/hr.
Since, 1 mile = 1610 m
1 hour = 3600 s
So,
So, the required speed of light is .
2. The alcohol in "gasohol" burns according to the following equation.
1 answer:
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Answer:
The reaction isn't yet at equilibrium. The overall reaction will continue to move in the direction of the products.
Assumption: this system is currently at .
Explanation:
One way to tell whether a system is at its equilibrium is to compare its reaction quotient with the equilibrium constant
of the reaction.
The equation for is quite similar to that for
. The difference between the two is that
requires equilibrium concentrations, while
can be calculated even when the system is on its way to equilibrium.
For this reaction,
.
Given these concentrations,
.
The question states that at ,
. Assume that currently this system is also at
. (The two temperatures need to be the same since the value of
depends on the temperature.)
It turns out that . What does this mean?
- First, the system isn't at equilibrium.
- Second, if there's no external changes, the system will continue to move towards the equilibrium. Temperature might change. However, eventually
will be equal to
, and the system will achieve equilibrium.
In which direction will the system move? At this moment, . As time proceeds, the value of
will increase so that it could become equal to
. Recall that
is fraction.
When the value of increases, either its numerator becomes larger or its denominator becomes smaller, or both will happen at the same time. However,
- Concentrations on the numerator of
- Concentrations on the denominator of
As time proceeds,
- the concentration of the products will increase, while
- the concentration of the reactants will decrease.
In other words, the equilibrium will move towards the products.
Answer:
Explanation:
No atoms of Mg have a mass of 24.3050 u. That is the average mass of all the isotopes of Mg.
However, the most common isotope of Mg is ₁₂²⁴Mg (mass = 23.99 u)
The atomic number of Mg is 12. It has 12 protons.
The atomic mass of ²⁴Mg is 24. That's the total number of protons and neutrons.
p + n = 24
12 + n = 24
n = 12
An atom of ²⁴Mg has 12 neutrons.
If the atom is neutral, the number of electrons equals the number of protons.
e = p = 12