CHEMISTRY COMMUNITY

snehabhargava

Yes, because they are measurements. Anything that is measured has to consider sig figs.

snehabhargava

Check the standard cell potentials.

snehabhargava

You should always flip it and then if is asks for standard cell potential for the entire cell you can add the standards for the anode and cathode. If you don't flip it then then you subtract the anode from the cathode.

snehabhargava

The nitrogen goes from an overall -1 charge to a zero charge.

snehabhargava

yes, because 1/4 is the half life of the half life.

snehabhargava

That is definitely correct.

snehabhargava

In a zero order reaction, the concentrations of the reactants does not effect the rate.

snehabhargava

we do not need to know any constants for this test

snehabhargava

They will be an equation given to us.

snehabhargava

That means that more reactants are produced.

snehabhargava

The value of k cannot be negative because the reaction rate cannot be negative and the relationship we know is based on the concentrations and time not of k because k is constant for every reaction at a constant pressure and temperature.

snehabhargava

That is the concentration of the reactants and you are dividing by the concentration.

snehabhargava

Because at the start there is no products formed so the only concentration you have is the one of the reactants

snehabhargava

Look at the standard cell potentials.

snehabhargava

You look at the electrons transferred during the half reactions.

snehabhargava

No because they are not ionized

snehabhargava

That equation is used when the pressure is constant.

snehabhargava

When do you use the heat capacity of water vs. the heat capacity of ice?

snehabhargava

It can be either one. Just depends on the problem.

snehabhargava

Yes, because it is an assumption to make calculations easier.

snehabhargava

The change in entropy of the universe is the same always.

snehabhargava

You use Q when the reaction is not at equilibrium and use K when the reaction is at equilibrium.

snehabhargava

It uses Cv,m because there is a constant volume so they can use that heat capacity.

snehabhargava

What is the difference between reversible and irreversible expansion?

snehabhargava

Internal energy is the total amount of energy in a system. The molar internal energy is the energy of the system per mole.

snehabhargava

Because when the bond enthalpy is less it takes less energy to break therefore, it is less stable. Bonds that take more energy are more stable because more energy is need to break the bonds.

snehabhargava

No, you assume that the water is in the liquid state the entire time.

snehabhargava

Yup. You would convert kcal to kj and mass to moles.

snehabhargava

The reverse will be exothermic because it will have a negative enthalpy.

snehabhargava

Hess's Law allows you to calculate enthalpy using products and reactants.

snehabhargava

This is true when w=0 because q has to be 0 so it is only true when both q is 0 and w is 0.

snehabhargava

In a net ionic equation, you only write what is actually reacting. For example, if you put the salt NaF in water it would completely dissociate but the Na+ will not react with anything. So the net ionic equation would be F- + H20 <--> HF + OH- instead of F- + H20 + Na+ <--> HF + OH- + Na+.

snehabhargava

A bronsted acid usually has a H+ that will be donated while a bronsted acid will usually have an OH- it will donate.

snehabhargava

The lewis structure of a lewis acid will not have a lone pair while an lewis base will have a lone pair to donate.

snehabhargava

The standard units for temperature is Kelvin (K)

snehabhargava

It does not have units because it is just a ratio and ratios do not have units.

snehabhargava

What does bisoxalato mean?

snehabhargava

The word angular and bent mean the exact same thing. Don’t worry about when to use either. They are the same.

snehabhargava

The word angular and bent mean the exact same thing. Don’t worry about when to use either. They are the same.

snehabhargava

A triple bond contains 1 sigma and 2 pi bonds because only one sigma bond can be created between 2 molecules so the other 2 have to be pi bonds.

snehabhargava

A sulfur dioxide molecule is always changing so in reality it is a blend of all 3 but it is in the state with the lowest formal charge the majority of the time.

snehabhargava

The structure with oxygen have a -1 charge is the most stable because oxygen is already very electronegative. It is the one with the lowest energy.

snehabhargava

This is the actually shape of the orbital with a 3d shape. It has been determined by flashing light.

snehabhargava

I do not think you have to draw all of the possible ones. If the first one you draw has a formal charge of 0 then you don't have to draw anymore.

snehabhargava

We are only considered with the valence shell electrons so that is the s and p orbitals and we will only be working with those.

snehabhargava

yes I agree, elements on the top left are smaller than elements on the bottom right side of the periodic table.

snehabhargava

It is proved by the fact that when you increase the intensity, there is no change. That means that it is dependent on the individual particle and not on the wave as a whole.

snehabhargava

When using Rydberg's equation, the frequency cannot be negative. To avoid this you put whatever the higher of the 2 energy levels for n1.

snehabhargava

You can determine what series it is by the smallest energy level so if n1 is 1 and n2 is 3, it is still a Lyman series and if n1 is 2 and n2 is 6, it is still a Balmer series.

snehabhargava

When it comes to constants, use the sig figs that are given in the problem to determine how many values past the decimal point to us in the speed of light constant or plank's constant.

snehabhargava

The conversion factors do not count for sig figs because they are exact values and are not measurements that is why it does not matter.

snehabhargava

This is a mistake in the solution manual. You should use the sig. figs. that are given in the question and not from the periodic table because the periodic table can vary.

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