## Search found 149 matches

Tue Mar 02, 2021 12:25 am
Forum: Chemistry forum
Topic: Meanings of triangle symbol associated with right arrow.
Replies: 5
Views: 264

### Re: Meanings of triangle symbol associated with right arrow.

https://www.saralstudy.com/upload/Images/question_images/chemistry/11th_chemistry_10_1_1_1526560961_92.png Answers:- https://www.saralstudy.com/upload/Images/question_images/chemistry/11th_chemistry_10_1_1_1526560961_79.png Now, my question is can we write the chemical reaction in the second case a...
Tue Mar 02, 2021 12:09 am
Forum: Chemistry forum
Topic: Ideal Gas Laws
Replies: 16
Views: 927

### Re: Ideal Gas Laws

That's correct. thanks. If, i am not wrong, the final volume is 4.04 L of Helium gas in the balloon.
Mon Mar 01, 2021 11:46 pm
Forum: Chemistry forum
Topic: Meanings of triangle symbol associated with right arrow.
Replies: 5
Views: 264

### Meanings of triangle symbol associated with right arrow.

What are the meanings of $$\xrightarrow{\Delta}, \overrightarrow{\Delta}$$ in chemical reaction equations?
Mon Mar 01, 2021 11:23 pm
Forum: Chemistry forum
Topic: Ideal Gas Laws
Replies: 16
Views: 927

### Re: Ideal Gas Laws

Question itself states my thinking. Question says one-half of initial value of temperature(X) and one third of initial value of pressure(Y). So ratio becomes $$\frac{\frac{X}{2}}{\frac{Y}{3}}$$.Simplifying, we get $$\frac{3X}{2Y}$$. That's it.
Mon Mar 01, 2021 10:38 pm
Forum: Chemistry forum
Topic: Ideal Gas Laws
Replies: 16
Views: 927

### Re: Ideal Gas Laws

So, Plugging all the available values in to the formula PV=NRT, we get the ratio of Kelvin temperature to pressure in Bar as 2.696927647572174. Thereafter the new ratio is \frac{X}{2} \times \frac{3}{Y}\rightarrow \frac{3X}{2Y} where X=Kelvin Temperature , Y= Pressure in Bar. What are the next compu...
Mon Mar 01, 2021 10:12 pm
Forum: Chemistry forum
Topic: Ideal Gas Laws
Replies: 16
Views: 927

### Re: Ideal Gas Laws

Initially, there was 4.5 L volume of Helium gas in the Balloon. So, what is your computed number of mole of Helium gas?
Mon Mar 01, 2021 9:42 pm
Forum: Chemistry forum
Topic: Ideal Gas Laws
Replies: 16
Views: 927

### Re: Ideal Gas Laws

So, what is your final answer? What is the ratio of temperature to pressure initially and after making adjustments to their values?
Mon Mar 01, 2021 10:34 am
Forum: Chemistry forum
Topic: What features do you expect from an electron-deficient hydride with respect to its structure and chemical reactions?
Replies: 1
Views: 155

### What features do you expect from an electron-deficient hydride with respect to its structure and chemical reactions?

An electron-deficient hydride does not have sufficient electrons to form a regular bond in which two electrons are shared by two atoms e.g. B2H6, Al2H6 etc. These hydrides cannot be represented by conventional Lewis structures. B2H6, for example, contains four regular bonds and two three centered-tw...
Thu Feb 25, 2021 9:34 am
Forum: Chemistry forum
Topic: Molecular orbital electrons configurations of Benzene and Nitrate anion
Replies: 1
Views: 187

### Molecular orbital electrons configurations of Benzene and Nitrate anion

O2 has 12 valence electrons. Its MO configuration is: O_2 = KK(\sigma_{2s})^ ²(\sigma_{2s}^*)^2(\sigma_{2p})^2(\Pi_{2p})^²(\Pi_{2p})^2 (\Pi_{2p}^*)(\Pi_{2p}^*) with one electron in each of the \Pi_{2p}^* orbitals spin aligned (Hund’s rule) and, bond order for O_2= \frac12(8-4) = 2. I want to know h...
Fri Feb 19, 2021 5:48 am
Forum: Chemistry forum
Topic: General chemistry question
Replies: 0
Views: 265

### General chemistry question

How to compute \Delta H^\circ, \Delta S^\circ, \Delta G^\circ at 25^\circ C for the following reactions? 1)Combustion of Methane 2)Formation of gaseous HCl from its elements. 3)Formation of H_3SiCl from its elements [ We will need to use bond energies and estimate \Delta S^\circ] My Answers: I know ...
Sun Feb 14, 2021 8:04 pm
Forum: Chemistry forum
Topic: Chemical structure of Sodium Percarbonate[Na2H3CO6]
Replies: 3
Views: 340

### Re: Chemical structure of Sodium Percarbonate[Na2H3CO6]

Hello,
So, 5 hydrogen bonds are present in the $$2Na_2CO_3.3H_2O_2$$. Isn't it?
Sun Feb 14, 2021 10:45 am
Forum: Chemistry forum
Topic: Chemical structure of Sodium Percarbonate[Na2H3CO6]
Replies: 3
Views: 340

### Chemical structure of Sodium Percarbonate[Na2H3CO6]

What is the chemical structure of Sodium percarbonate [Na_2CO_3.1.5 H_2O_2] ? I want to know whether in the chemical structure of sodium percarbonate given in the following link, are H_2O_2 molecules connected to Na_2CO_3 molecules through hydrogen bonding? If they are connected through hydrogen bon...
Fri Feb 05, 2021 6:30 am
Forum: Chemistry forum
Topic: Bond dissociation energies
Replies: 2
Views: 325

### Re: Bond dissociation energies

I got answer to this question.

The figures given in the parenthesis against each bond dissociation energies are Uncertainty.

e.g $$Al - Al 186 \pm 9kJ/mol$$
Fri Feb 05, 2021 5:59 am
Forum: Chemistry forum
Topic: Two step mole conversions
Replies: 4
Views: 415

### Re: Two step mole conversions

I am sorry. I computed for CH₃N₂. I shall edit my answer now.
Thanks for finding out error in the computation
Fri Feb 05, 2021 5:19 am
Forum: Chemistry forum
Topic: Two step mole conversions
Replies: 4
Views: 415

### Re: Two step mole conversions

A sample of Calcium Nitride Ca3N2having a mass 6.78 grams have 2.75e22 atoms which is= 0.0457 mole.