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3 years ago

Which of these equations correctly expresses the self-ionization of water?

Chemistry

1 answer:

quester [9]3 years ago

8 0

Answer

D. H2O +H2O ------> H3O + OH-

Explanation:

The self-ionization of water is the chemical reaction in which two water molecules react to produce an H3O + oxonium ion and an OH− hydroxide ion, here one water molecule behaves as an acid and the other as a base.

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Balance these equations

kiruha [24]

Answer:

4Al + 3O2 -> 2Al2O3

2N2 + 6H2 -> 4NH3

5 0

3 years ago

Read 2 more answers

How do I solve the following word problem: The half-life of Phosphorus - 32 is 14.3 days. It is used to study a plant's use of f

BaLLatris [955]

Half life is the time that it takes for half of the original value of some amount of a radioactive element to decay.

We have the following equation representing the half-life decay:

$A=A_o\times2^{(-\frac{t}{t_{half}})_{}_{}}$

A is the resulting amount after t time

Ao is the initial amount = 50 mg

t= Elapsed time

t half is the half-life of the substance = 14.3 days

We replace the know values into the equation to have an exponential decay function for a 50mg sample

$A=\text{ 50 }\times2^{\frac{-t}{14.3}}$

That would be the answer for a)

To know the P-32 remaining after 84 days we have to replace this value in the equation:

$\begin{gathered} A=\text{ 50 }\times2^{\frac{-84}{14.3}} \\ A=0.85\text{ mg} \end{gathered}$

So, after 84 days the P-32 remaining will be 0.85 mg

4 0

1 year ago

Which of the following terms is a term that could refer to heterogeneous matter? a. element b. mixture c. compound d. solution

kupik [55]

Answer : b. mixture

<h3>Further explanation</h3>

Element and compound are included in pure substance where the composition is the same in each part

Elements are made up of 1 type of atom, while the compounds of 2 or more types of atoms , both can be represented in the form of chemical symbols

A mixture is a combination of substances. The properties of a substance in the mixture component are unchanged

The mixture can be a homogeneous mixture or a heterogeneous mixture

the homogeneous mixture if each part has the same composition

the heterogeneous mixture if each part has a different composition

Solution including into Homogeneous mixture, while suspension into a heterogeneous mixture

So a term that could refer to heterogeneous matter : b. mixture

6 0

3 years ago

PLEASE ANSWERRRRRR

Kay [80]

Electromagnetic wave travels faster through air than metal.

Option A

Explanation:

There are different kinds of wave energy. The most significant are electromagnetic and mechanical waves. The mechanical waves propagate through the medium by transfer of energy by vibrating of particles in medium.

So, the more number of particles present in the medium, the more fast the mechanical wave can propagate. So the mechanical waves travel faster in metals consisting of more number of free charge carriers. But electromagnetic waves does not need any of the medium to propagate. So it can travel faster in air than in metals.

7 0

4 years ago

Balance the following chemical questions

Gre4nikov [31]

Answer:

1.SnO2+2H2--> Sn+2H2O

2.4FeS+7O2--> 2Fe2O3+4SO2

3. C2H6O+3O2-->2CO2+3H2O

4.2AgI+Na2S-->Ag2S+2NaI

8 0

3 years ago