CHEMISTRY HIGH SCHOOL

What is an ion? Please, give an example.

Answers

Answer 1
Answer: an atom or molecule with a net electric charge due to the loss or gain of one or two electrons is known as ion . 
ions are of two types 
1. cations ( positive ion )
2. anion (negative ion )
for e.g Al³+
Answer 2
Answer: An Atom is electrically neutral with a charge equal to 0, because it have the same number of protons and electrons.
In ion is an atom who lose or gain electrons. When it lose an electron, the number of protons will be higher than then number of electrons in an normal atom, and will be called positive ion or cation. 
Example: The Aluminium lose 3 electrons. So the ion of Al will be Al^(3+), and its charge is 3+
Ionization equation: Al -----\ \textgreater \ Al^(3+) + 3^(e-)
And When an ion gain electrons, the number of electrons will be higher than the number of protons in an normal atom, and will be called negative ion, or Anion..
Example: the Chloride gain 1 electron. So the ion of Cl is Cl^(1-), and its charge is 1-
Ionization equation: Cl + 1^(e-) ----\ \textgreater \ Cl^(1-)

HOPE THIS HELPS :D

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Do you think that there is a high correlation between proficiency in mathematics and proficiency in chemistry? Explain why or why not. Use details about the components of each field to support your answer.

Answers

According to the fact that they both include the reaction change of elements through different processes, there should be a nice connection between them. In math, numbers pose as an element, and in chem - elements are physical things. Both of them can change due to reaction or a formula.

A weather balloon of known initial volume is released. The air pressures ar its initial and final altitudes are known. Why can't you find its new volume by using these known values and Boyle's law?

Answers

Answer: you cannot find its new volume by using these known values and Boyle's law because the temperature does not remain constant.


Explanation:


Boyle's law states that the volume of a fixed amount of gas, at a constant temperature, varies inversely with the pressure.


So, it is a condition that the temperature does not change.


For the wheater ballon case, as it travels through the atmosphere, the temperature at different altitudes will be different.


So, you might use other equation of states, such as the combined law, which does deal with changes in the three variables: volume, pressure, and temperature.


The mathematical formulation of Boyle's law is:


pV = constanjt ⇒ p₁ V₁ = p₂ V₂, at constant T.


The mathematical formulation of the combined law of gases is:


pV/T = constant ⇒ p₁ V₁ / T₁ = p₂ V₂ / T₂, for a fixed amount of gas, then it might work for the weather ballon (if you know the initial and end temperatures).

You cannot find the new volume by using initial volume of the weather balloon and air pressure ai its initial and final altitudes and Boyle’s law because the given values are not the same. Boyle’s law holds for the pressure and volume of the GAS at constant temperature. Here you are given the air pressure outside the weather balloon not the inside of the balloon. They have different gases and so it would not apply.

How many moles of atoms are in 2.00 g of 13c?

Answers

There are 0.154 moles of atoms in 2.00 g of carbon-13.

Further Explanation:

Moles, Atomic mass and Molecular mass  

  • 1 mole of a pure substance contains a mass that is equal to the relative atomic mass or molecular mass of the substance.
  • Therefore; molar mass is given as grams per mole of a substance  

Hence;

Molar mass = mass of a substance/ Number of moles  

     g/mol = g /mole  

Thus;

  • M = m/n; where M is the molar mass, m is the mass and n is the number of moles
  • From this relationship we can therefore, calculate mass by multiplying the number of moles by molar mass of a substance.

That is; Mass = moles x molar mass  

  • To calculate number of moles;

We have; n = m/M

Number of moles = Mass of the substance/ Molar mass

  • In our case;

Mass = 2 g of Carbon-13  

Molar mass = 13.0 g/mol  

Since; Number of moles = Mass/ molar mass

Thus;

Moles = (2.0 g)/ (13.0 g/mol)

          = 0.154 moles  

Keywords: Moles, Molecular mass, relative atomic mass  

Learn more about:

Level: High school  

Subject: Chemistry  

Topic: Moles  

Sub-topic: Moles, molecular mass and mass of a pure substance.

Which of the following is not a polyatomic ion? A) NO3- B) CaCO3
C) C2H3O2-
D) C6H5COO-

Answers

CaCO₃ is a compound in and of itself thus it is not a polyatomic ion.

CaCO3 is your answer!

Given that ka for hclo is 4.0 x 10-8 at 25 °c, what is the value of kb for clo- at 25 c

Answers

The Ka of HClO is 4.0 x 10^-8 at 25 C. The dissociation of HClO is:

HClO + H2O ---> H+ + ClO -    T = 25 C

Ka = 4.0 x 10^-8 = [H+][ClO-]/[HClO]

pH = -log[4.0 x 10^-8]
pH = 7.40
pOH = 14 - 7.40
         = 6.60
Kb = 10^-6.6

Can someone help me with my chemistry homework?!

Answers

Answer:

calculate grams and use mole ratio lol

Explanation:

Answer:

Explanation:

23

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