It bonds to skin because
solid polymer requires the presence of water to get things started, be it in the air or on your skin. Without a little moisture, SuperGlue can't bond anything. This explains why the glue is so good at sticking fingers together.
Answer:
- Report all accidents, injuries and breakage of class or equipment to instructor immediately.
- Keep pathways clear by placing extra items on the shelves or under the work tables. If under the tables make sure that these items can no be stepped on.
- Long hair (chin-length or longer) must be tied back to avoid catching fire.
- Wear sensible clothing including footwear. Loose clothing should be secure so they do not get caught in a flame or chemicals.
- Work quietly - know what you are doing by reading the assigned experiment before you start to work. Pay close attention to any cautions described in the laboratory exercises.
- Do not taste or smell chemicals.
- Wear safety goggles to protect your eyes when heating substances, dissecting, etc
- Do not attempt to change the position of glass tubing in a stopper.
- Never point a test tube being heated at another student or yourself. Never look into a test tube while you are heating it.
Hope this helps:))
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Answer:
The highest molar concentration is in the solution of potassium chloride because it's the one, with the highest molar mass.
Explanation:
If we have the same mass and the same volume in all the solutes and solutions, we should know the molar mass for each, to calculate how many moles of solute are we having.
a. LiOH → 23.94 g/m
b. KCl → 74.55 g/m
c. KOH → 56.1 g/m
d. NaOH → 40 g/m
The highest molar mass is in option b. It will have the most moles.
<h3>Answer:</h3>
The smallest unit which maintains the physical properties of a compound is a <u>Molecule</u>.
<h3>Explanation:</h3>
Option-A, <u><em>Atom</em></u> is incorrect because statement is asking about the physical properties of a compound. Therefore, as compound is made up of two or more, same or different atoms hence, atom can not be the correct answer.
Option-B, <u><em>Element</em></u> is also incorrect because Element can be mono-atomic like He, Ne, Ar <em>e.t.c </em>or a molecules like N₂, O₂, F₂ <em>e.t.c</em> but it can't be a compound because in compound the joining elements are different as all compounds are molecules but all molecules are not compounds.
Option-C, <u><em>Molecule</em></u> is the correct answer because all compounds are molecules unless the atoms forming the compound are different.
Option-D, <em><u>Alloy</u></em> is also incorrect because Alloys are a homogeneous mixture of two or more metals. Hence, they can't be considered as compounds as they can be separated by physical means.
