CHEMISTRY COMMUNITY

Abraham De Luna

The change in reactants is always negative while the change in products is always positive.

Abraham De Luna

Yes, temperature is the only thing that can change the value of K.

Abraham De Luna

You can calculate the total pressure by simply adding all of the partial pressure values.

Abraham De Luna

It is probably recommended that you just remember what the strong and weak acids are.

Abraham De Luna

Yes, the reactants will always be on the left and the products will always be on the right.

Abraham De Luna

When you are using the quadratic formula you can ignore the negative answer that you get back.

Abraham De Luna

Typically, all single bonds have one sigma bond and all double bonds have one sigma bond and one pi bond. Also, a triple bond would have a one sigma bond and two pi bonds. So when you are counting the amount of sigma bonds in a molecule make sure to consider the sigma bonds present in double and tri...

Abraham De Luna

You should consider the electronegativity between the atoms in the molecule and whether the dipole moments created counteract each other or not.

Abraham De Luna

For this question make sure you take into consideration all the possible types of bonds that could used. You should also consider the arrangement you put the molecules in. Also make sure if there are any rings that you can form. Good Luck!

Abraham De Luna

An example of a non-polar molecule would O2 and it is non-polar because there are not any partial charges present.

Abraham De Luna

From my understanding, the negative poles would be found towards the atom that is more electronegative.

Abraham De Luna

Yes, I believe that it can help determine polarity because because VSPER helps determine the shape and structure of the molecule.

Abraham De Luna

For Midterm 2 we should expect to see any material after MT1 to the end of outline 3.

Abraham De Luna

The bond angle will depend on the arrangement of electrons and molecular shape.

Abraham De Luna

I think it is safe to assume that we will have to know how to recognize the shapes and angles.

Abraham De Luna

There are not any hydrogen bonds because H is not bonded to anything that has a high electronegativity.

Abraham De Luna

yeah it seems like the length of the bacterium would be the same wavelengths of the photon.

Abraham De Luna

After finding the wavelength then you can use c= wavelength x frequency to find the frequency. All you would have to do is manipulate the formula and plug in what you have.

Abraham De Luna

(velocity)= h/(mass)(wavelength)

Abraham De Luna

Yeah, I believe you are supposed to use that as the wavelength.

Abraham De Luna

I dont think you need to worry about that since the questions on the midterm will be multiple choice.

Abraham De Luna

Thanks guys, these explanations were very helpful.

Abraham De Luna

Normally you would want to wait until the final answer before you round.

Abraham De Luna

Unless the questions states otherwise, I would go ahead and use the finals unit that you would end up with.

Abraham De Luna

It seems like kelvin is the main one that we will be using in class but I would still be familiar with the other ones just in case.

Abraham De Luna

I believe that we do not have to worry about remembering most conversion factors and that they will be given to us.

Abraham De Luna

It is to emphasize that the oxygen is what is bonded and not the hydrogen.

Abraham De Luna

The roman numeral is the charge of the metal in the compound.

Abraham De Luna

The oxidation number refers to the charge the molecule has.

Abraham De Luna

I think the coordination number is the number of bonds attached to the central ion.

Abraham De Luna

yes that is what it is.

Abraham De Luna

You should list them in alphabetical order based on the root.

Abraham De Luna

Cis molecules would be polar and trans molecules are nonpolar.

Abraham De Luna

You must put them in alphabetical order and then consider the charge.

Abraham De Luna

An amphiprotic is a something that can both accept and donate a proton.

Abraham De Luna

Acids will usually have h atoms.

Abraham De Luna

One of the differences is that bronsted acids donate protons, however Lewis acids accept electrons.

Abraham De Luna

Water molecules use both Hydrogen atoms to form a hydrogen bond.

Abraham De Luna

A single bond would have 1 sigma bond, a double bond would have a sigma bond and a pi bond, and a triple bond would have a sigma bond and 2 bonds.

Abraham De Luna

The way that it works is that a single bond would have a sigma bond. A double bond would have a sigma bong and pi bond and a triple bond would have a sigma bond and two pi bonds.

Abraham De Luna

Noble gases have no electronegativity sincecthey already have a full octet

Abraham De Luna

Yes since the molecule with the lone pair would alter the degrees of the bond angles.

Abraham De Luna

The presence of hydrogen bonds increases the melting point.

Abraham De Luna

As the electronegativity increases the atomic radius decreases.

Abraham De Luna

I recommend doing the homework on the chemical bonds section.

Abraham De Luna

Yes covalent bonds can only be formed by two non-metals.

Abraham De Luna

You choose the central atom by picking the atom that has the lowest ionization energy.

Abraham De Luna

Ionization energy is indeed the energy required to remove an electron from an atom.

Abraham De Luna

I believe that you find the atomic radius by measuring the distance between the nuclei of two touching atoms.

Abraham De Luna

Yes, it is a constant so it will always be the same.

Abraham De Luna

We would use the equation in order to find the energy of a photon. However, it does have other uses.

Abraham De Luna

Hz is equivalent to 1 cycle/second.

Abraham De Luna

Avogadro's number represents the number of atoms in per mol of a substance.

Abraham De Luna

Most of the time the limiting reactant is given in the problem, but it can either be in moles or grams it just depends on the circumstance.

Abraham De Luna

The law of conservation of mass states that atoms cannot be created or destroyed.

Abraham De Luna

He specified to do either fundamentals or quantum world for homework 2.

Abraham De Luna

Should I take sig figs while I am calculating one problem step by step? Should I use sig figs every step or should I just consider the sig figs on the very last calculation? I believe that you should only use significant figures on the last calculation. It is also important to keep in mind that sig...

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