Hi,

Given reaction is C + O2 --------> CO2

Now, we know that 1 mole of Carbon reacts with 1 mole of Oxygen to form 1 mole of Carbon dioxide.

Hence, let x be the mass of Carbon initially. Now moles of C are  = x /12 , and now it will be equal to 1.

i.e. x = 12 g

Hope it helps.

Hello student,

Here's a solution to your query :

We must calculate how many moles of potassium chlorate reacted

Use the formula moles=given mass / molar mass

The mass of the reactant in the question is 200g . The molar mass of the reactant is 158.034gmol−1

200 / 158.034=1.26555mol of the reactant.

Ratio - 2:1

Therefore, 1.26555 / 2=0.632775mol of oxygen is produced.

Answer : The mass of produced oxygen is 20.2475g.

Thanks.

Dear student,

Your question is incomplete, because you have not provided the volume of solution. And without volume of solution, normality of 41g H3PO3 can't be found out.

But still here let me show you that how you will proceed or approach this question.

Phosphorous acid has a n-factor of 2.

Now, equivalent weight of phosphorus acid =  ( molar mass of H3PO3 ) / n-factor

So, equivalent weight ( E ) = 82/2 = 41

Now, normality is defined as - number of equivalents of solute present in 1000ml of solution.

N = { W (in g) × 1000 } / E × volume of solution ( in ml )

So, as you can see, without the volume of solution, your cannot find normality.

V1=25 dm3          T1=283k

V2=30 dm3          T2=?

According to Charles law

V2/V1 = T2/T1

30/25 = T2/283

T2 = 30×283/25

T2 = 339.6k

Hello Aspirant,

Number of moles (N) weigh 1Kg of electrons can be calculated as described below :-

Mass of an electron= 9.1 x 10^-31 Kg

Avogadro Number=6.022 x^10^23

N = 1/(9.1 x 10^-31*6.022 x^10^23)

N = 1.8x10^6 moles of electron is the answer.

I hope this information helps you.

Good Luck!!

Hello Sachin ,

The solution of oleic acid spreads very fast on the surface of water . It forms thin layer with some thickness of only one molecule . Why because oleic acid has low density compared to water so , this is the reason why oleic acid float on water .

It belongs to category called lipids generally these are commonly called as "Fat Molecule"  it have both hydrophilic (Molecules which are dissolves in the water ) and hydrophobic (Molecules which are not soluble in water) parts .

I think this answer will helps you lot .

All the best !!!!

Hello

IUPAC name of n-propyl ethanoate is

Propyl acetate

Feel free to ask..

Good Luck...

Hello,

The more 's' character of hybrid orbital a molecule have the greater angle between bond.From Bent s Rule equation[cos x =s/s-1](Where x is abond angle and s is the %s character in the bond),it is clear that if we increases bond angle,the %s character will be maximum.

In other words

S   character is a contribution of S orbital in hybridization .S character is directly  proportional to bond angle.The more  S   character of hybrid orbital a molecule have,the grater is the angle between their bond.

I hope this information helps u,

Thank you.

Hello aspirant

The energy level is lowest when all of its orbitals are filled and atom's reactivity depends on how many electrons it needs to complete it's octet. There are two electrons in each bond . If number if electrons are four there will be double bond and so on

Hai Chandan,

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms . Atoms are extremely small, typically around 100 picometers across.