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Rom4ik [11]
2 years ago
6

You are on a field trip to a nearby lake for biology class and want to perform a quick analysis of the water’s approximate pH le

vel. Which pH measurement system would you use and why?
Chemistry
2 answers:
sp2606 [1]2 years ago
7 0

Sample Response: Using pH paper would be best for doing a quick measurement in the field. It does not need to be calibrated and the papers provide an instant estimate. Answer on Ed

umka21 [38]2 years ago
4 0
The easiest way to approximate ph level is the ph paper because there are no exprimentation required and it is very handy. so it is the best way to approximate the ph level of a lake, especially when you are outdoors, and it is just an initial reading of the ph. so ph paper will do.
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Sodium oxide (Na2O) crystallizes in a structure in which the O2– ions are in a face - centered cubic lattice and the Na+ ions ar
melisa1 [442]

We have to know the number of Na⁺ ions in the unit cell.

The number of Na⁺ ions in the unit cell is (D) 8.

Sodium oxide (Na2O) crystallizes in a structure in which the O2– ions are in a face - centered cubic lattice and the Na+ ions are in tetrahedral holes.

O²⁻ ions are in a face centred cubic lattice, so the number of O²⁻ ions per unit cell is equal to 4. The number of  tetrahedral hole= 2 X 4=8. Na+ ions are present in tetrahedral holes, which indicates there are 8 number of Na+ ions in the unit cell.


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2 years ago
Liquid X is known to have a higher surface tension and higher viscosity than Liquid Y Use these facts to predict the result of b
creativ13 [48]

Answer:

O FX will be greater than FY

Explanation:

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This required force is proportional to the liquid's surface tension. This means that the higher the surface tension, the higher the required force to stretch it is.

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2 years ago
Functional groups create ____________ sites in molecules. The polar part of a molecule that can hydrogen bond to water is said b
zhenek [66]

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5 0
2 years ago
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Luda [366]

Answer:

4. The combined volume of the Ar atoms is too large to be negligible compared with the total volume of the container.

Explanation:

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The non-zero volume of the molecules implies that instead of moving in a given volume V they are limited to doing so in a smaller volume. Thus, the molecules will be closer to each other and repulsive forces will dominate, resulting in greater pressure than the one calculated with the ideal gas law, that means, without considering the volume occupied by the molecules.

5 0
2 years ago
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asambeis [7]

Answer:

D.

Explanation:

8 0
2 years ago
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