I am absolutely sure that when divided by △t, (vf - vi) is used to determine Acceleration - the third option from the scale represented above. It is a special case when the acceleration is contstant 0. Hope you will find it helpful! Regards.
Answer:
The answer is 7.04278 x 10⁻³, and the log(10) is -2.15
Explanation:
In a 0.887 M NaNO₃ solution there are 0.887 mol in 1 liter of solution, We know that 1 L= 1000 ml, so we can calculate the number of mol which are in 7.94 ml as follows:
solute mol= 7.94 ml x 0.887 mol/ 1000 ml = 7.04278 x 10⁻³ mol
We take log(10) of 7.04278 x 10⁻³ and we obtain: -2.15
Can you give us the answer choices?
Answer:
See explanation and image attached
Explanation:
Here attached are resonance forms of pyrrole and pyridine. The images were obtained from quora and researchgate respectively.
Now, we can see that in the resonance forms of pyrrole, the nitrogen atom in the heterocycle has a formal charge of +1. However, in the six membered pyridine hetrocycle, the nitrogen atom may have a formal charge of -1 or +1 as shown in the canonical structures attached. The structures in which nitrogen has a +1 formal charge in pyridine are comparable to structures obtained from pyrrole. These structures have less contribution to the structure of pyridine.
Answer:
D) 5.36 hours
Explanation:
According to mole concept:
1 mole of an atom contains number of particles.
We know that:
Charge on 1 electron =
Also, copper will produce 2 electrons. So, out of 5 moles of copper, 10 moles of electrons will be produced.
So,
Charge on 10 mole of electrons =
To calculate the time required, we use the equation:
where,
I = current passed = 50.0 A
q = total charge =
t = time required = ?
Putting values in above equation, we get:
Converting this into hours, we use the conversion factor:
1 hr = 3600 seconds
So,
Hence, the amount of time needed is 5.36 hrs.