Answer:
0.13 s
Explanation:
We'll begin by converting 24900 mile to metres (m). This can be obtained as follow:
1 mile = 1609.344 m
Therefore,
24900 mile = 24900 mile × 1609.344 m / 1 mile
24900 mile = 4.01×10⁷ m
Finally, we shall determine the time taken for light to circumnavigate the Earth, this can be obtained as follow:
Distance = 4.01×10⁷ m
Speed = 2.998×10⁸ m/s
Time =?
Speed = distance / time
2.998×10⁸ = 4.01×10⁷ / time
Cross multiply
2.998×10⁸ × time = 4.01×10⁷
Divide both side by 2.998×10⁸
Time = 4.01×10⁷ / 2.998×10⁸
Time = 0.13 s
Thus, it will take 0.13 s for light to circumnavigate the Earth.
The density is the mass of a substance per unit volume. The surface water density is higher at the poles, and lower at the equator. Thus, the statement is false.
<h3>What is the relation between density and latitude?</h3>
The latitude is the distance from the poles. As moving down from the equator, the temperature increases. The increase in temperature at the equator allows larger mass to accumulate in a unit volume of water.
The larger mass-to-volume ratio results in the increased density of the water.
Thus, the ocean water has a higher density at the equator than poles, due to temperature differences. Therefore, the given statement is false.
Learn more about surface water density, here:
brainly.com/question/2968053
Explanation:
Reaction equations for the given species is as follows.
At the first equivalence point we need 2 × 10 mmol NaOH.
At the second equivalence point we need 5 mmol of NaOH.
Hence, total moles of NaOH required is as follows.
(20 + 5) mmol = 25 mmol
We assume that volume of NaOH required is V.
= 250 ml V
Thus, we can conclude that 250 ml of 0.10 M NaOH must be added to reach second equivalence point of the titration of the 
and NaOH.
