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nordsb [41]
4 years ago
5

9.

Chemistry
1 answer:
777dan777 [17]4 years ago
7 0

Answer:

salt in the Dead Sea is sodium chloride

while salt in the lab is either soluble or

insoluble in water.

Explanation:

The term 'salt' in the school laboratory does not always refer to sodium chloride. It is a generic term used for many substances especially those substances formed by neutralization reaction.

There are many salts that are used in the laboratory. Some of these salts are soluble in water while some are not soluble in water.

Salt in the dead sea always refers to sodium chloride, hence, salt in the dead sea is different from salt in the school laboratory.

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A reaction between liquid reactants takes place at - 11.0 degree C in a sealed, evacuated vessel with a measured volume of 45.0
Sati [7]

Explanation:

The given data is as follows.

       T = 11^{o}C = (11 + 273) K = 284 K,     V = 45.0 L

      m = 35 g

As molar mass of chlorine pentafluoride is 130.445 g/mol. Hence, number of moles of chlorine pentafluoride are as follows.

      No. of moles = \frac{mass}{\text{molar mass}}

                             = \frac{35 g}{130.445 g/mol}

                             = 0.268 mol

Now, using the ideal gas equation we will find the pressure as follows.

                          PV = nRT

       P \times 45.0 L = 0.268 mol \times 0.082 L atm/mol K \times  284 K

                       P = 0.139 atm

Thus, we can conclude that pressure of chlorine pentafluoride gas in the given reaction vessel after the reaction is 0.139 atm.

4 0
3 years ago
In parallel circuits different _____________ different branches of the wire?
Helga [31]
I believe that this is the answer :


in parallel circuits, different loads has different branches of wire



good luck
3 0
3 years ago
A bauxite mining company has got government permission to acquire agricultural land in a location to start surface mining activi
viktelen [127]

Answer:

make reclamation compulsory after bauxite has been removed

Explanation:

Available options:

<em>choose other infertile and uninhabited locations for bauxite mining </em>

<em> allow agriculture and mining to take place simultaneously in the location </em>

<em> ask farmers in the location to help in mining bauxite </em>

<em> make reclamation compulsory after bauxite has been removed</em>

The correct option and the best plan to solve the problem of permanent dislocation of farmers would be to make reclamation compulsory after the bauxite has been removed.

Reclamation would involve restoring the agricultural land back to its original status prior to the commencement of bauxite mining. By doing this, the farmers can return to their farmland after being temporarily displaced due to the mining activities.

6 0
3 years ago
How much of a 0.250 M sucrose solution must be used to prepare 400.0 mL of a 0.0310 M solution? mL
kolezko [41]

Answer:

49.6 mL

Explanation:

is the answer, I just did it :)

3 0
3 years ago
The melting point of gallium metal is 29.76°C If a piece of gallium is sliced into three parts, the melting point will be:
Nikolay [14]

Answer:  B. 29.76°C

Explanation:

The melting point is known as an intensive property of matter. This means the melting point is not affected by the amount of mass. Whether the metal is really large or small, the melting point of gallium (Ga) is roughly 29.76 degrees Celsius.

5 0
3 years ago
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