The person walk 2346.95 meters in 35 minutes
<u><em>calculation</em></u>
convert miles to meters
that is 1 miles= 1609.34 meters
2.5 miles= ? meters
by cross multiplication = (2.5 miles x 1609.34 meters) / 1 miles= 4023.35 meters.
if 4023.35 meters = 1 hr= 60 min
? meters =35 min
by cross multiplication
= 4023.35 meters x 35 min/ 60 min =2346.95 meters
Answer:
e. When the indicator changes color and remains, 2 more drops of the solution in the buret should be added.
Explanation:
<em>Which statement is incorrect?
</em>
<em>Select one:
</em>
<em>
a. The volume of solution in the buret should be recorded when the endpoint is reached.
</em> CORRECT. At the endpoint, the titrant is expected to have completely reacted with the titrand.
<em>b. It is good practice to place the flask over a white background to better observe the color change of the solution.</em> CORRECT. Using a white background makes it easier to detect the changes in the color of the indicator.
<em>c. The endpoint is when the indicator changes color.</em>
CORRECT. This is the function of an indicator.
<em>d. Phenolphthalein will go from a colorless solution to a pink solution for the addition of NaOH to an acid solution.</em> CORRECT. Phenolphthalein is colorless when pH < 8.3 and it is pink when pH > 10.0.
<em>e. When the indicator changes color and remains, 2 more drops of the solution in the buret should be added.</em> INCORRECT. When the endpoint is reached, no more titrant should be added.
In the simple cubic
unit cell, the centers of <span>eight identical particles identical particles define the corners of a cube. T</span><span>he particles do touch along the cube's edges, but do not touch along the cube's </span>diagonally or through the center. There is/are eight particle (one atom) per unit cell and the coordination number is six.
There is three types
of cubic cell:<span>
1) simple cubic unit cell.
2) body-centered cubic unit cell.
3) face-centered cubic-unit cell.
The simple cubic unit cell is the
simplest repeating unit in a simple cubic structure, the edge of a
unit cell always connects equivalent points</span> <span>
</span>
[Ar] 4s²
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