According to the rydberg equation, the longest wavelength (in nm) in the series of h- atom lines with a) 1875 nm b) 1458 n ans: a c) 820 nm d) 656 nm e) 365 nm

A) 1875 nm

Explanation:

Hello,

In this case, the Rydberg equation is shown below:

For the series of H- atom, one assigns: as this is the Paschen series with emission down to the level. Now, we must consider that the longest wavelength is from the nearest upper level to the level, that is, the level. In such a way, the resulting wavelength is computed as shown below:

Best regards.

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).

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml