A beaker about two-thirds full of a liquid. check all that apply. pour using tongs. wear chemical resistant gloves. taste to make sure it is hcl. One should wear chemical resistant gloves.
It is not at all possible to pour the liquid with the help of tongs because it may spill and cause harm, in case it is hazardous.
Also tasting whether the liquid is hcl or not is not gonna help because we don't know whether the chemical is fatal or not. Even if it is Hcl, tasting it is not a good option, because it will cause damage to our tongue and other parts of mouth.
Thus the most convenient thing to do is to wear chemical resistant gloves to ensure safety.
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If we read the complete exercise, we can understand that the correct answer is 9 students.
This is a math related exercise.
If we take into consideration that Sean is the 5th highest in the class, it means that there are four more people before him.
However, he is also the 5th lowest mark in the class, so it means that there are four more people below him.
If we also count Sean, there are:
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Cutting an apple is a physical change. the chemical make-up remains the same.
Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
The reasons why DDT is classified as a persistent organic pollutant are;
- DDT can be used to control diseases, such as malaria and typhus, that are spread by insects.
- DDT is detected in food worldwide and the general human population is most commonly exposed to the toxin through food.
Persistent Organic Pollutants can be regarded as toxic substances which are made up of organic chemical compounds.
These are industrial chemicals such as;
DDT is classified as a persistent organic pollutant because of it's usefulness in control diseases and it is been found in food stuff across the globe.
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