CHEMISTRY COMMUNITY

sandraabdelmalak1D

Never mind! Got it.

sandraabdelmalak1D

I'm not sure if I am just calculating this wrong but can someone walk me through this problem? You are studying the following unbalanced reaction at high temperatures: NH3 (g) ⇌ N2 (g) + H2 (g) In one of your experiments at 500K the measured partial pressures are: NH3 0.887 bar H2 0.168 bar N2 0.056...

sandraabdelmalak1D

The problem asks:
On the basis of the expected charges of the monatomic ions, give the chemical formula of each of the following:
c) manganese(IV) oxide.
I don't really understand how to handle this/what the (IV) means.

sandraabdelmalak1D

I believe that angular and bent mean the same thing.

sandraabdelmalak1D

I am not sure about the oxidation portion of the question either, but i also got that the coordination number is 4.

sandraabdelmalak1D

ok so just to clarify, is there a certain rule to abide by when seeing if an element can exceed the octet rule? I know that the rule of thumb is if it equals n=3 or above but if someone can explain in more detail that'd be awesome.

sandraabdelmalak1D

can someone explain to me how i can tell if the shape of a molecule will be angular/bent or linear? I know it has something to do with lone pairs but I need a little bit more help.

sandraabdelmalak1D

For part C, it asks how many electrons can have the following quantum numbers in an atom and it gives us n=4, l=2, ml= -2. The answer in the book is 2 electrons, can someone please walk me through it? Thank you.

sandraabdelmalak1D

You are caught in a radar trap and hope to show that the speed measured by the radar gun is in error due to the Heisenberg uncertainty principle. If you assume that the uncertainty in your position was +/- 5 m when your speed was measured, and that the car has a mass of 2150 kg, what is your calcula...

sandraabdelmalak1D

The hydrogen atom has a radius of approximately 0.05 nm. Assume that we know the position of an electron to an accuracy of 1 % of the hydrogen radius, calculate the uncertainty in the speed of the electron using the Heisenberg uncertainty principle. Comment on your value obtained. Can someone walk m...

sandraabdelmalak1D

Calculate the de Broglie wavelength of a 0.155 kg ball travelling at 85.0 m.s-1. Can we detect this wavelength or observe the wavelike characteristics of this ball?

I got that the answer is 5.03 x 10^-35 m. I just don't understand how to determine whether something has wavelike properties or not?

sandraabdelmalak1D

In the above spectroscopic experiment what is the most unique characteristic of the observed results? Hint: What does a typical spectrum look like? A. All wavelengths of light are absorbed or emitted. Spectrum consists of lines. B. No wavelengths of light are absorbed or emitted. Spectrum consists o...

sandraabdelmalak1D

There are 3 subshells in the shell where n=3.
The number of types of subshells is the same as the shell number.
The first shell has one type of subshell (s)
The second shell has two types of subshells (s, p)
The third shell has three types of subshells (s, p, d).

sandraabdelmalak1D

According to the following equation, 0.750 g of C6H9Cl3 is mixed with 1.000 kg of AgNO3 in a flask of water. A white solid, AgCl, completely precipitates out. What is the mass of AgCl produced? C6H9Cl3 + 3AgNO3 ---> AgCl + C6H9(NO3)3. Molar Mass: C6H9Cl3 (187.50 g/mol), 3AgNO3 (169.88 g/mol), AgCl (...

sandraabdelmalak1D

There are no discussion sections or office hours on Tuesday I believe, Professor Lavelle said so in class on Friday.

sandraabdelmalak1D

To prepare a fertilizer solution, a florist dilutes 1.0L of 0.20 M NH4NO3 (aq) by adding 3.0L of water. The nurse then adds 100.0 mL of the diluted solution to each plant. How many moles of nitrogen atoms will each plant receive? Solve this exercise without using a calculator. Can someone walk me th...

sandraabdelmalak1D

Using the electron configuration of another element in brackets and then containing the configuration is just a shorthand way of writing the entire thing out. I don't think there's any particular reason other than that it is shorter, but I might be wrong.

sandraabdelmalak1D

Not sure that this entirely answers your question, but on the syllabus it says it will cover material reviewed up till July 5th.

sandraabdelmalak1D

A student prepared a solution of sodium carbonate by adding 2.111g of the solid to a 250.0mL volumetric flask and adding water to the mark. Some of this solution was transferred to a buret. What volume of solution should the student transfer into a flask to obtain a) 2.15 mmol Na+; b) 4.98mmol CO3^-...

sandraabdelmalak1D

For the following equation, determine the limiting reagent if 21.4 g NH3 is reacted with 42.5 g of O2. 4NH3(g) + 5O2(g) ---> 4NO(g) + 6H2O(g) I understand how to do this problem until I get to the part where I compare the calculated moles with the required moles in the balanced equation. How do I us...

sandraabdelmalak1D

Can the mass of a product (or products) be greater than the total mass of reactant (or reactants)?

I'm just not sure about this one and wanted a definitive answer. Thank you!

CHEMISTRY COMMUNITY

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