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2 years ago

Help on chem! Will give 30pts!

Chemistry

1 answer:

Irina-Kira [14]2 years ago

5 0

Here, substitution reaction is undergoing and the energy levels of each reaction phase is marked in graph. Its an exothermic reaction.

<h3>Explanation:</h3>

The substitution reaction is a type of reaction where a part of a molecule is substituted by another molecule to produce 2 products.

Here in the graph, in phase A we can see two molecules are coming in a reaction and they are at a particular energy level as marked. In phase B, we can see that the molecules are undergoing the substitution reaction via SN² reaction where the energy level is higher than the original energy level because of the activation energy. The difference between the energy levels is called the activation energy which is marked as D.

The final phase is the final energy levels of these 2 products where the energy level is much lower than original energy level. So the energy is lost through the reaction as heat. So the reaction is exothermic.

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ASAPP Subtract to find the temperature changes

mamaluj [8]

Hello, I would like to help you, but I really don't understand the question

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2 years ago

Boiling refers to which phase change?

Monica [59]

Boiling or also called evaporation is the conversion of liquid to gas through the application of heat. This phase change is an endothermic change and is the opposite of condensation from gas to liquid.

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2 years ago

A 2.89 g sample of a metal chloride, MCl2, is dissolved in water and treated with excess aqueous silver nitrate. The silver chlo

dsp73

Answer:

58.0 g/mol

Explanation:

The reaction that takes place is:

MCl₂ + 2AgNO₃ → 2AgCl + M(NO₃)₂

First we calculate how many moles of silver chloride were produced, using its molar mass:

6.41 g AgCl ÷ 143.32 g/mol = 0.0447 mol AgCl

Then we convert AgCl moles into MCl₂ moles, using the stoichiometric ratio:

0.0447 mol AgCl * $\frac{1molMCl_2}{2molAgCl}$ = 0.0224 mol MCl₂

Now we calculate the molar mass of MCl₂, using the original mass of the sample:

2.86 g / 0.0224 mol = 127.68 g/mol

We can write the molar mass of MCl₂ as:

Molar Mass MCl₂ = Molar Mass of M + (Molar Mass of Cl)*2

127.68 g/mol = Molar Mass of M + (35.45 g/mol)*2

Finally we calculate the molar mass of M:

Molar Mass of M = 57 g/mol

The closest option is 58.0 g/mol.

6 0

2 years ago

In an internal combustion engine, platinum speeds up the oxidation of carbon monoxide to carbon dioxide. Platinum is needed for

butalik [34]

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3 years ago

Can someone help me with 11

Leokris [45]

An ionic bond is formed between metal and non metal when they exchange electrons.

The opposing bond would be covalent which is formed between non metal and non metal.

To form an ionic bond, pair any two metal and non metal that will exchange electrons such as LiBr, NaCl, etc.

Hope this helps!

4 0

3 years ago

Read 2 more answers