Search found 898 matches

by ChenBeier
Fri Oct 15, 2021 5:09 am
Forum: Chemistry forum
Topic: I read somewhere online that the compounds that appear blue have more conjugation than red compounds. Why is that?
Replies: 1
Views: 43

Re: I read somewhere online that the compounds that appear blue have more conjugation than red compounds. Why is that?

The appearance of a colour of something is the opposit colour of the light what will be absorbed. Blue colour means red to yellow light will be absorbed and vise versa. So blue colour has more conjugation for this reason and vise versa.
by ChenBeier
Thu Oct 14, 2021 2:18 am
Forum: Chemistry forum
Topic: Balanced equation for the reaction
Replies: 1
Views: 71

Re: Balanced equation for the reaction

Silver chloride and lead chloride will not react each other, because both have bad soloubility.

You can do the same as described with the silver nitrate, add Sodium chloride to lead nitrate then lead chloride will precipitate.
by ChenBeier
Wed Oct 13, 2021 9:34 pm
Forum: Chemistry forum
Topic: Help me balancing this equation! Grade 10
Replies: 5
Views: 106

Re: Help me balancing this equation! Grade 10

Nitrite Hydrate is negative charged. H2NO3- You wrote a neutral molecule H2NO3. The neutral molecule is not existing. As described in your link it is a compound with nitrite NO2- and water H2O. You need also a positiv charge like sodium. So you would have NaNO2 with one water attached. This is total...
by ChenBeier
Wed Oct 13, 2021 7:26 am
Forum: Chemistry forum
Topic: How to calculate the molarity of glacial acetic acid?
Replies: 3
Views: 48

Re: How to calculate the molarity of glacial acetic acid?

Its correct so far.
Only
Volume of 100 grams of glacial acetic acid = 1001.049 = 95.329 ml
is strange, what is 1001.049?

100 g correspond to 95,3 ml is correct.
by ChenBeier
Tue Oct 12, 2021 1:14 am
Forum: Chemistry forum
Topic: Hi! Please help me with this.
Replies: 1
Views: 61

Re: Hi! Please help me with this.

First write the acids in half structure form
What means
C9H19COOH and C3H7COOH

Acids react with metal under developing hydrogen
2 RH + 2 Li => 2 RL + H2 and
2 RH + Ca => R2Ca + H2

Combine it with the given acids.
by ChenBeier
Tue Oct 12, 2021 1:07 am
Forum: Chemistry forum
Topic: Help me balancing this equation! Grade 10
Replies: 5
Views: 106

Re: Help me balancing this equation! Grade 10

That what it means , there is no H2NO3 in this world, because nitrogen is only pentavalent.
by ChenBeier
Mon Oct 11, 2021 10:56 am
Forum: Chemistry forum
Topic: Help me balancing this equation! Grade 10
Replies: 5
Views: 106

Re: Help me balancing this equation! Grade 10

H2NO3 is not existing . Nitrogen is not hexavalent. It's only HNO2 or HNO3 existing.

NO2 dissolved in water gives

H2O + 2 NO2 => HNO3 + HNO2
by ChenBeier
Sun Oct 10, 2021 11:34 pm
Forum: Chemistry forum
Topic: should be super easy for chemists. HELP
Replies: 1
Views: 42

Re: should be super easy for chemists. HELP

Easy for chemists, but what about you. What ideas do you have? It is not a homework forum.
by ChenBeier
Sun Oct 10, 2021 11:27 pm
Forum: Chemistry forum
Topic: HELP
Replies: 3
Views: 67

Re: HELP

It is not generally wrong. What do you get if you solve my proposal? Compare the two results. In the given files they using H+ and OH- together for solving the equation. This is mathematicaly possible but not in reality. H+ can not exist with OH-. This will be water. At the end they get acetic acid ...
by ChenBeier
Sun Oct 10, 2021 5:42 am
Forum: Chemistry forum
Topic: HELP
Replies: 3
Views: 67

Re: HELP

Something wrong, you cannot get an acid here acetic acid and an hydroxide here potassium hydroxide in same time. It will be neutralized to potassium acetate. Reaction with alkene https://www.chemistrylearner.com/wp-content/uploads/2020/07/Baeyers-Reagent.jpg Reaction with alkyne https://courses.lume...
by ChenBeier
Mon Oct 04, 2021 4:57 am
Forum: Chemistry forum
Topic: calculating the concentration
Replies: 4
Views: 199

Re: calculating the concentration

Correct
by ChenBeier
Mon Oct 04, 2021 3:35 am
Forum: Chemistry forum
Topic: calculating the concentration
Replies: 4
Views: 199

Re: calculating the concentration

c = n/V concentration = moles divided by volume
by ChenBeier
Sun Oct 03, 2021 10:22 am
Forum: Chemistry forum
Topic: Calculate the amount of substance
Replies: 3
Views: 129

Re: Calculate the amount of substance

Ok, it's a different question. Phosphorouspentoxide is existing bimolecular what means the real formula is P4O10.

The reaction is P4 + 5 O2 => P4O10 = 2 P2O5

But 4 mol is wrong, make no sense.
by ChenBeier
Sun Oct 03, 2021 6:17 am
Forum: Chemistry forum
Topic: Calculate the amount of substance
Replies: 3
Views: 129

Re: Calculate the amount of substance

It's a given number. It can also 10, 0,5 98,67 mol or others