CHEMISTRY COMMUNITY

Aleena_Sorf_2A

Q: What do you call a tooth in a glass of water?
A: A one molar solution

Aleena_Sorf_2A

Q: What did the scientist say when he found 2 isotopes of helium?
A: HeHe

Aleena_Sorf_2A

Why are chemists great for solving problems?
- They have all the solutions.

Aleena_Sorf_2A

Q: What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A: A ferrous wheel:
Fe - Fe
/ \
Fe Fe
\ /
Fe - Fe

Aleena_Sorf_2A

To find the rate of a reactant, we use the following formula: Rate= - Delta [R] / Delta T Since the concentration of reactants is decreasing over time, we use a negative in the equation to cancel out the negative value of concentration. In the course reader on page 59, it also says that we want to w...

Aleena_Sorf_2A

Helium walks into a bar.
The bar tender says, “We don’t serve noble gasses in here.”
Helium doesn’t react.

Aleena_Sorf_2A

Q: Did you hear about the man who got cooled to absolute zero?
A: He's 0K now

Aleena_Sorf_2A

A piece of ice fell in love with a Bunsen burner...

"Bunsen! My flame! I melt whenever I see you!" , said the ice. The bunsen burner replied: “It’s just a phase you’re going through.”

Aleena_Sorf_2A

Some chemistry puns!

1) What do you do with a sick chemist?
-If you can't helium, and can't curium, then you might as well barium.

2) I told a chemistry joke, but there was no reaction!

3) All the good periodic table jokes argon?
I dont zinc so!

Aleena_Sorf_2A

Why are the C=C bonds only breaking and not the C-H bonds for problem 8.75b?

Aleena_Sorf_2A

Work done on the system means something outside of the system (the surroundings) did something to increase the internal energy of the system. Work done by the system means the system's internal energy decreased as it did work on something outside the system (its surroundings).

Aleena_Sorf_2A

The value -169,2 kJ is not the answer because the final equation does to contain NO as a a reactant. In order to cancel the unwanted NO, we must do the following: -169.2kJ= the enthalpy of formation of N2O5 (which is what we are trying to solve for) - 2(+90.25 kJ) = +11.3kJ The second part of this e...

Aleena_Sorf_2A

Question: What kind of fish is made out of 2 sodium atoms?

Answer: 2NA!!

Aleena_Sorf_2A

Question: What is the show cesium and iodine love watching together?

Answer: CSI

Aleena_Sorf_2A

When it asks us to name the complex ion in part c, why is cobalt written as cobaltate? For example, both part b and part d have the compound written as cobalt.

Aleena_Sorf_2A

The shape of SCl4 is trigonal bipyramid. Therefore, by drawing the VSEPR shape, we see that the dipole moments do not cancel out.

Aleena_Sorf_2A

Do Not Trust Atoms!!
They Make Up Everything...

Aleena_Sorf_2A

The Lewis structure of XeO2F2 is not allowed with Ne as a central atom because the central atom with an expanded octet must have an atomic number that is greater than 10.

Aleena_Sorf_2A

According to the Aufbau Principle, electrons fill up orbitals with the lowest energy first before filling up the higher energy orbitals. For example, an electron configuration for Cl would be 1s^2, 2s^2, 2p^6, 3s^2 ,3p^5, because a 3p orbital has greater energy than a 2p orbital. Hund's Rule states ...

Aleena_Sorf_2A

L.39 Given: mass of Sn= 1.50 g mass of crucible= 26.45 g mass of crucible and oxide= 28.35 g mass of oxide= 28.35g-26.45g= 1.90 g mass of oxygen= 1.90-1.50 g= .4 g 1.50 g Sn x (1 mol Sn/118.71 g Sn)= 1.264 x 10^-2 mol Sn .4 g x (1mol O/16.00 g O)= .025 mol O You would then divide the moles by the sm...

Aleena_Sorf_2A

How does the Stern and Gerlach Experiment demonstrate electron spins?

Aleena_Sorf_2A

In this problem, we are given the masses of the reactants and the actual yield. We are asked to calculate the percent yield, which can be solved by this formula: Percent Yield= (Actual Yield/Theoretical Yield) x 100 However, we first need to find the theoretical yield, which can be done by solving f...

CHEMISTRY COMMUNITY

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8.75b HOMEWORK PROBLEM

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