They are properly geared
Explanation:
Students should come into contact with chemical only if they are properly geared.
Chemical are substances produced from the reaction of compounds with one another. Most chemicals are toxic and harmful to the human body.
To handle chemicals, students must be prepared and be properly geared.
- It is good to know a chemical before handling it.
- Use appropriate apparatus in the laboratory.
- Abide with safety rules in laboratories.
- Wear laboratory coats at all time.
- Wear safety boots.
- Wear nose covers to prevent inhalation of harmful gases.
- Wear safety googles.
- Handle equipment with utmost care.
- Do not be careless in the laboratory.
- Do not eat, drink or play in the laboratory.
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Mendleev arranged his periodic table in order of Atomic Mass...
<em>Merits of Mendeleev Periodic </em><em>Table:</em><em>-</em>
Some gaps were left for the elements yet to be discovered. Thus, if a certain new element is discovered, it can be placed in a new group without disturbing any existing group.
Hope it helps... pls mark brainliest
Let V = the volume of the sample at STP.
The mass is m = 75 g
The density of gold is 19.32 g/cm³
Because density = mass/volume, therefore
(19.32 g/cm³) = (75 g)/(V cm³)
V = (75 g)/(19.32 g/cm³) = 3.882 cm³
Answer: 3.882 cm³
