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Margarita [4]
3 years ago
8

Choose all the right answers.

Chemistry
2 answers:
USPshnik [31]3 years ago
4 0

Answer:

They run out of fuel

Some heat radiates out

High pressure gases move the piston

LuckyWell [14K]3 years ago
3 0
They run out of fuel
Some heat radiates out
High pressure gases move the piston
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what happens to change the solubility when you added 6.0 M HCl to the second test tube with benzoic acid
shusha [124]

Answer:

It becomes insoluble again.

Explanation:

The chemical equation showing the reaction between benzoic acid, and sodium hydroxide,NaOH is given below;

C6H5COOH + NaOH ------------------------> C6H5COO^- Na^+ + H2O.

The Benzoic acid, C6H5COOH is insoluble but when it reacted with 1M Sodium hydroxide, NaOH it changes to sodium benzoate, C6H5COO^- Na^+ which is more soluble than the benzoic acid.

C6H5COO^- Na^+ + HCl -------------------> C6H5COOH + NaCl.

When the sodium benzoate, C6H5COO^- Na^+ reacts with 6M HCl, it is converted back to benzoic acid which is insoluble. Hence, precipitation is observed.

8 0
3 years ago
An extremely soluble salt is added to water, and all of it dissolves. Is it at equilibrium? Explain.
alexdok [17]
Once the substance stops dissolving, the system is at equlibrium with the water and the undissolved salt now, if it is in the process of dissolving because it is completely soluble but has not been able to completely dissolve, it is not at equilibrium
5 0
3 years ago
Give the name of the products formed
attashe74 [19]

Answer:

With Br2 - Bromobenzene

With Cl2 - Chlorobenzene

With HNO3- Nitrobenzene

With H2SO4 - Benzenesulphonic acid

With HCOCl - Benzoyl chloride

With 1-chloro-2,2-dimethylpropane - 2,2dimethyl-1-phenyl propane

Explanation:

The common thread joining all these reactions is that they are all electrophillic reactions. They are so called because the attacking agents in each reagent is an electrophile. Electrophiles are species that have electron deficient centers and are known to attack molecules that are high in electron density at regions of high electron density.

The benzene molecule has rich electron density. Any substituents that donates electrons to the ring improves the likelihood that benzene will undergo electrophillic substitution reactions while electron withdrawing substituents decrease the likelihood that benzene will undergo electrophillic substitution reactions.

The names of the compounds formed when benzene undergoes electrophillic reaction with the attacking agents listed in the question are displayed in the answer section.

7 0
3 years ago
Why does the chloride ion have a charge of -1
Alexandra [31]

Explanation:

As we know that chloride ion is halogen. So it has seven valence electrons in its valence shell. Hence it gains one electron from others during chemical reaction to be stable. So Chloride ion have a negative charge of -1.

Hope it will help :)❤

8 0
3 years ago
Which of the changes are chemical changes?
puteri [66]

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.
7 0
4 years ago
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