## Search found 11 matches

Fri Oct 11, 2019 1:45 am
Forum: Properties of Electrons
Topic: electron energy [ENDORSED]
Replies: 7
Views: 203

### Re: electron energy[ENDORSED]

When an electron moves up a level, it absorbs energy so it can keep getting the energy to keep going up levels, until it exhausts and drops back down and releases all the energy it pent up.
Fri Oct 11, 2019 1:43 am
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 205
Views: 141600

### Re: Rusty on High School Chem[ENDORSED]

The modules are the biggest help, as well as just going through each problem one by one in the textbook with the answers to check it. It's not much about skill, it's mostly just practice and getting into the habit of it. The programs like Step Up and Peer Learning are also a massive support.
Fri Oct 11, 2019 1:37 am
Forum: Properties of Light
Topic: Atomic Spectra
Replies: 7
Views: 97

### Re: Atomic Spectra

This is correct, the UV gap is the biggest and the most dramatic in drop of energy as it it from between n=1 and n=2. The other gaps are much closer around about n=5 which falls under visible and infrared, the drop in energy is much more dramatic.
Fri Oct 11, 2019 1:29 am
Forum: Properties of Light
Topic: Energy Levels
Replies: 8
Views: 155

### Re: Energy Levels

UV radiation is the highest energy, but as the n is dropping from points like '6' to '4', the loss of energy is too much and has to compensate by release electromagnetic radiation.
Fri Oct 11, 2019 1:21 am
Forum: Properties of Light
Topic: Emission/line spectrum
Replies: 3
Views: 53

### Emission/line spectrum

I understand that 400-700 is when light is visible and what the spectrum means. I'm just confused on how this applies to calculating frequency or energy? Or is it more conceptual?
Fri Oct 04, 2019 12:26 am
Forum: Molarity, Solutions, Dilutions
Topic: Converting Before or After?
Replies: 10
Views: 189

### Converting Before or After?

I was confused about how you would know what unit the final answer should be in, especially when it's something as vague as "Find the mass". In addition to this, do you convert the units before you go about the problem, or after you have already solved it?
Fri Oct 04, 2019 12:24 am
Forum: Empirical & Molecular Formulas
Topic: 100 gram Method?
Replies: 9
Views: 126

### Re: 100 gram Method?

Simply put, if the problem doesn't already give you a given mass, then you assume that the percent given is out of 100 grams. This makes the work much easier! Instead of having to go about solving this, you can just assume it's out of 100 and turn the percent into a whole number with less of a hassl...
Fri Oct 04, 2019 12:15 am
Forum: Balancing Chemical Reactions
Topic: Fractions in front of compounds
Replies: 12
Views: 181

### Re: Fractions in front of compounds

Considering that we only multiply the whole equation since we're trying to get rid of the divisor from the fraction, we don't have any other use of multiplying the whole equation, unless if it's to get rid of a fraction. This is because stoichiometric is preferred to be in whole integers, and having...
Fri Oct 04, 2019 12:10 am
Forum: Molarity, Solutions, Dilutions
Topic: Molar Mass
Replies: 5
Views: 80

### Re: Molar Mass

Considering that an ion just has a different charge than a regular atom since it is gaining or losing electrons, this doesn't have much of an impact of the molar mass since the electron weighs nearly nothing to be having an effect on the molar mass.
Fri Oct 04, 2019 12:08 am
Forum: Significant Figures
Topic: How many sig figs when in decimals?
Replies: 6
Views: 167

### Re: How many sig figs when in decimals?

There would only be one sig figs, considering that the only significant number (1), only appears after 4 other zeroes, all of which aren't considered significant. Some factors that could have changed this outcome is there being another number before the zeroes, deeming all the zeroes after a signifi...
Fri Oct 04, 2019 12:07 am
Forum: Significant Figures
Topic: How many sig figs when in decimals?
Replies: 6
Views: 167

### Re: How many sig figs when in decimals?

There would only be one sig figs, considering that the only significant number (1), only appears after 4 other zeroes, all of which aren't considered significant. Some factors that could have changed this outcome is there being another number before the zeroes, deeming all the zeroes after a signifi...