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3 years ago

Compounds usually have the same properties as the bonds they are made from true or false

1 answer:

8 0

Well , I will say this is a false statement.
This is because compounds which were all made by the same bond have same physical properties but different chemical properties.

Chemical Properties :
How do the subtances react with ( water, acid,alkaline, base , gas like oxygen, etc. )

Physical Properties :
- Solubility of those subtances in (water or organic solvent )
- Electric Conductivity
- Melting or Boiling Point
- Density
- Smell (exp : Ammonia has pungent smell , Esters has fruity smell)

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(a) what product or products would you expect to obtain by the addition of bromine to cis-cinnamic acid, assuming that it reacts

Free_Kalibri [48]

If the totaling of bromine to cis-cinnamic acid uses the same mechanism or device as the addition to trans-cinnamic acid, addition of bromine only transpires on the top (syn) and not the bottommost face (anti). Therefore, bromine added to cis-cinnamic only adds to the same face (syn addition) as a result producing only threo dibromides.

3 0

3 years ago

What gets reduced in an electrolytic cell made with nickel and copper electrodes?

jekas [21]

Answer:

D. Ni²⁺

Explanation:

We know at once that the answer cannot be A or C, because Ni and Cu are already in their lowest oxidation states.

The correct answer must be either B or D.

An electrolytic cell is the opposite of a galvanic cell. In the former, the reaction proceeds spontaneously. In the latter, you must force the reaction to occur.

One strategy to solve this problem is:

Look up the standard reduction potentials for the half reaction·
Figure out the spontaneous direction.
Write the equation in the reverse direction.

1. Standard reduction potentials

E°/V

Cu²⁺ + 2e⁻ ⟶ Cu; 0.3419

Ni²⁺ + 2e⁻ ⟶ Ni; -0.257

2. Galvanic Cell

We reverse the direction of the more negative half cell and add.

E°/V

Ni ⟶ Ni²⁺ + 2e⁻; 0.257

Cu²⁺ + 2e⁻ ⟶ Cu; 0.3419

Ni + Cu²⁺ ⟶ Cu + Ni²⁺; 0.599

This is the spontaneous direction.

Cu²⁺ is reduced to Cu.

3. Electrochemical cell

E°/V

Ni²⁺ + 2e⁻ ⟶ Ni; -0.257

Cu ⟶ Cu²⁺ + 2e⁻; -0.3419

Cu + Ni²⁺ ⟶ Ni + Cu²⁺; -0.599

This is the non-spontaneous direction.

Ni²⁺ is reduced to Ni in the electrolytic cell.

8 0

3 years ago

You are given the following boiling point data. Which of the liquids would you expect to have the highest vapor pressure at room

Leokris [45]

Answer:

Diethyl ether

Explanation:

vapor pressure - the pressure exerted by the gaseous molecules on the walls of the container , is called its vapor pressure.

The compound with higher boiling point , will have lower vapor pressure ,

and the compound with lower boiling point , will have higher vapor pressure.

Hence, Boiling point and vapor pressure have inverse relation.

The vapor pressure and boiling point both, depends on the inter molecular interactions , i,e, the interaction between the molecules.

Since, the compound with stronger inter molecular interactions, will not easily convert to gas, hence will have higher boiling point between , therefore , its vapor pressure would be less.

But the compound with less inter molecular interactions , can easily vaporize to convert to gaseous state and hence will have lower boiling point, therefore, its vapor pressure would be higher .

Among all the options , diethyl ether have lowest boiling point , hence, will have highest vapor pressure , at room temperature.

6 0

3 years ago

Balance the equation by inserting coefficients as needed. equation: C 2 H 6 O+O 2 longrightarrow CO 2 +H 2 O

shepuryov [24]

The coefficients needed to balance the equation would be 2, 7, 4, and 6 respectively.

<h3>Balancing chemical equation</h3>

This requires that the number of atoms of each element is the same both on the reactant and product's sides.

Hence, the balanced equation of the reaction becomes:

$2C_2 H_6 O+ 7O_2 --- > 4CO_2 +6H_2 O$

Thus, the coefficient for each species would be 2, 7, 4, and 6 respectively.

More on balancing chemical equations can be found here: brainly.com/question/15052184

#SPJ1

4 0

3 years ago

the volume of a gas is 450mL when it’s pressure is 1.00 atm. if the temperature of the gas does not change, what is the pressure

Bezzdna [24]

Answer:i DON NOT KNOW SORY

Explanation:

5 0

4 years ago

Read 2 more answers