Calculate the number of moles of an ideal gas if it occupies 1750 dm3 under 125,000 pa at a temperature of 127 c.

The answer is:

The number of moles (n) is 65.55 mol.

To solve the problem, we need to use the ideal gas law.

The Ideal Gas Equation is given by the following expression:

Where,

P, is the pressure in atm

V, is the volume in liters (L)

n, is the number of moles

R, is the Ideal Gas Constant

T, is the temperature in Kelvin (K)

We are given the information:

We need to convert the given units in order to use the Ideal Gas Equation, so, converting we have:

Pressure:

We know that:

So, converting we have

Volume:

We know that:

So, we have:

Temperature:

We know that to convert from celsius degrees to Kelvin, we need to perform the following operation:

So, converting we have:

Also,  we have that

Now, substituting the given information into the equation to isolate "n", we have:

Hence, we have that the number of moles (n) is 65.55 mol.

Have a nice day!

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).