CHEMISTRY COMMUNITY

Camille 4I

For part B, why would the pH become greater than 7?

Camille 4I

The answer key says that Sb will form four single bonds. Which structure is more stable?

Camille 4I

What makes for a higher boiling point, ion-dipole interactions or hydrogen bonding?

Camille 4I

Why is cisplatin square planar and not tetrahedral?

Camille 4I

How do oxygen atoms affect the strength of an acid here?

Camille 4I

How do we know that HBrO is the corresponding weak acid that creates the base BrO-?

Camille 4I

In the question 1b28, the diameter is given as 2.00x10^2 nm. Should I use 2.00x10^-7 meters for the diameter for delta X?

Camille 4I

Are T-shaped molecules all in the same plane? Or are they 3D?

Camille 4I

What is the equation for this reaction?

Camille 4I

What is the reasoning behind Na having a smaller first ionization energy than Mg?

Camille 4I

I am very confused on this concept. If Ni has 8 electrons in its 3d orbital, and a full 3d orbital is 3d10, then shouldn't there be 8 electrons that are unpaired?

Camille 4I

Will we have to use this equation on the final or simply know the concept behind it?

Camille 4I

How would you solve this problem using the equation En = -hR/n^2? This is the equation included on the Constants and Equations sheet.

Camille 4I

Hi, I have been solving for delta p with this equation: (6.62607x10^-34)/(4pi)(350x10^-12) and then using this answer in the equation delta P=mv. However, my answer continues to be 1.63x10^6. What could I be doing wrong?

Camille 4I

I believe the coordination sphere is useful in determining the shape of a compound because coordination sphere refers to the ligands directly attached to the central atom.

Camille 4I

I believe the coordination sphere is useful in determining the shape of a compound because coordination sphere refers to the ligands directly attached to the central atom.

Camille 4I

I understand why the Carbon atom is sp2 hybridized, but why is the Oxygen atom also sp2 hybridized?

Camille 4I

So bond angle decreases as s-character decreases? Because when a structure gains more atomic orbitals, its bond angles decrease as the orbitals are forced closer together?

Camille 4I

How do the 4 phosphorus atoms form a tetrahedral? Wouldn't they form a trigonal planar shape?

Camille 4I

To answer this question, do you have to write out the electron movement during transformation?

Camille 4I

How would you determine the bond angles of iodine trichloride? I understand the shape, but not the angles.

Camille 4I

Is it safe to assume that a molecule like SCl4 that has a trigonal bipyramidal electron arrangement but with one lone pair, will become a seesaw shape?

Camille 4I

Why is the shape of this molecule T-shaped, and not seesaw?

Camille 4I

What is the lewis structure for ClO2-?

Camille 4I

Do the fluorine atoms repel the hydrogen atoms and push them closer together, since the fluorines have a lot more electrons than the hydrogen atoms?

Camille 4I

Do lone pairs have more repulsion than double bonds?

Camille 4I

How do you know that the two bonds with hydrogen are next to each other, versus across the molecule from each other?

Camille 4I

If an atom has three lone pairs, wouldn't two of the lone pairs have stronger repulsion than the single lone pair on the other side?

Camille 4I

However, if I were to try to solve this equation, how would I determine the velocity to plug in?

Camille 4I

Hi,
Wouldn't we want Ni to have a half full 3d orbital, since it is more stable that way?

Camille 4I

What equation would we use to relate velocity with wavelength?

Camille 4I

Why do we have to multiply 32J/S by 2?

Camille 4I

Also,
does the fact that the radiation consists of y-ray photons matter in this situation?

Camille 4I

How can you determine that the formula for ammonium chloride is NH4Cl?

Camille 4I

Hi, are you using the formal charge equation to figure out that this is phosphorus?

Camille 4I

How do you know to multiply 5.00 m/s by 2?

Camille 4I

Hi, do we have to memorize the mass of a neutron? Or will be provided this on tests, because the question did not provide this mass.

Camille 4I

Would I be able to convert to kilograms after proceeding with the equation? I already did the De Broglie equation and am wondering if it is possible to convert these units after doing the calculations.

Camille 4I

Do I have to look up the masses of protons and neutrons? I know they are both roughly around 1, but since they are slightly different and I need to calculate the difference in wavelengths, should I use a more specific number?

Camille 4I

How do you change the answer value in meters to pm? The answer in the back of the book is in pm.

Camille 4I

For the ultraviolet region of atomic hydrogen, I know that n=1. Can I use the equation frequency = R(1/n1^2 - 1/n2^2) to solve these problems?

Camille 4I

Planck's constant is used in equations such as E=hu and E=hc/λ.

Camille 4I

I'm pretty sure that as energy can't be "negative", you should take the absolute value of the answer that you get at the end of the equation.

Camille 4I

How can you tell that the transition is in the Lyman series from the fact that it is in the ultraviolet spectrum of atomic hydrogen?

Camille 4I

In this problem, is the kinetic energy referring to the excess energy? Or is it referring to the energy needed to emit an electron?

Camille 4I

Where did you get the number 4.200x10^-19 from?

Camille 4I

How does fluctuation in wavelength of energy affect the intensity of the energy? Is it inversely or directly proportional?

Camille 4I

I am also confused about when ions bond together, whether or not their charges will be unequal to their positive proton charges. Or do the bonds between them cancel out their ionic charges?

Camille 4I

Solid boron can be extracted from solid boron oxide by reaction with magnesium metal at a high temperature. A second product is solid magnesium oxide. a) Write a balanced equation for the reaction. b) What mass of boron can be produced when 125 kg of boron oxide is heated with 125 kg of magnesium? T...

Camille 4I

What does oxidize mean in this equation? Does it mean simply how much oxygen is needed to react with 454 grams of tristearin?

Camille 4I

Do we actually have to double the solution 90 times? If so, is there a formula or shortcut way of doing this?

Camille 4I

Is there a way to count for two nitrogen atoms in one mole of NH4NO3 before the final calculation?

Camille 4I

For molecules that do not contain metals, do you always determine the name by number of atoms?

Camille 4I

How would you determine the total mass of the sample due to oxygen? When I start with 0.042 moles of copper (II) chloride tetrahydrate, I identify that there are 4 moles H2O in 1 mole of copper (II) chloride tetrahydrate. Can I then proceed with identifying that there is 1 oxygen atom in H2O? How sh...

Camille 4I

How would you use dimensional analysis to determine moles of Cl- ions from 8.61 grams of copper (II) chloride tetrahydrate? I understand how to convert the grams to moles, but I am stuck as how to proceed.

Camille 4I

Does anyone know how to determine what the formula for nitrous acid is? Are there rules that can help with this?

Camille 4I

Hello, I understand that nitric acid is composed of NO3 and H, and that most acids have H in their formula. Also, I am aware that NO3 is an ion with a negative charge and H is an ion with a positive charge, which holds them together in an ionic bond. But how would you know that NO3 (nitrate) should ...

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