Answer:
[H+] is 3.31 × 10^-11 M
Solution: Basic
Explanation:
In the question we are given;
Concentration of Hydroxide ion [OH-] as 3.0 × 10^-4 M
We are required to determine the [H+] and whether the solution is acidic, basic or neutral.
We know that;
pOH + pH = 14
and that;
pOH = - log [OH-]
Therefore;
pOH = - log ( 3.0 × 10^-4)
= 3.52
But;
pH = 14 - pOH
Thus;
pH = 14 - 3.52
= 10.48
But, we know that;
pH = - log[H+]
Therefore;
H+ = Antilog -pH
= Antilog -10.48
= 3.31 × 10^-11
Thus, the concentration of H+ ions [H+] is 3.31 × 10^-11 M
Also since the pH is 10.48, then the solution is basic
Yes
If this helped and you have any other questions, feel free to comment on my wall. Hope this helped.
Answer:
60 Miles per Hour
Explanation:
You included no scenario so I will develop a hypothetical that you can reference.
Assuming a car traveled a distance of 450 miles from one place to another in 9 hours with the car travelling 180 of those miles between 6 hours and 9 hours, what was the average speed between those 6 and 9 hours.
The car travelled 180 miles in 6hours - 9 hours. First find out how many hours this is:
= 9 - 6
= 3 hours
Speed = Distance / Time
= 180 / 3 hours
= 60 miles per hour
Why use significant digits you ask? Significant digits or significant figures are use as to not be too precise of an actual calculated measure.
Long decimal numbers location like 3.45 * sqrt of 3 gives 5.975575286112627.
That number is too precise.
Rounding it to 5.98 shows an exact closeness to the precision of the measure.
