Answer:
In advance
middle
lower
Explanation:
These are the safety precautions needed when carrying out duties in the fume hood.
When planning and preparing to work in a fume hood (a locally designed area to reduce exposure to hazardous fumes). It is advisable to make all equipment readily available at your disposal <u>in advance</u> to reduce and minimize the raising and lowering of the hood sash at intervals.
It is also pertinent to understand that working in the<u> middle </u>of the work surface helps to promote the movement of air and keeps the area neat and tidy.
However, if any case where there is a need to get a new tool or equipment during the process of working in a fume hood, it is advisable to <u>lower </u>the sash at that point in time.
Answer:
(4) Inner core. (5) magma. (6) crust (7) Convection current. (8) energy waves
Explanation:
Answer:
7.35 atm
Explanation:
From the question we are given;
- Initial volume, V1 as 28 L
- Initial temperature, T1 as 42°C or 315 K
- New volume. V2 as 49 L
- New temperature, T2 as 27°C or 300 K
- New Pressure, P2 as 4.0 atm
We are required to determine the initial pressure, P1
We are going to use the combined gas law...
According to the combined gas law,
Therefore, to get P1
We get;
Therefore, the initial pressure of the gas is 7.35 atm
Answer:
The correct option is: E. No precipitate will form.
Explanation:
A solubility chart refers to the list of solubility of various ionic compounds. It shows the solubility of the various compounds in water at room temperature and 1 atm pressure.
Also, according to the solubility rules, the salts of chlorides, bromides and iodides are generally soluble and mostly all salts of sulfate are soluble.
Since, all the compounds formed in this double replacement reaction are soluble in water. Therefore, no precipitate will be formed.
ZnSO₄ (aq) + MgCl₂ (aq) → ZnCl₂ (aq) + MgSO₄ (aq)
