So for D you have to find energy right
from c you get wavelength Lambda
so on D use this
E = Hc / lambda
c is given 1.5 x 10 ^20
h = 6.624 x 10^-34
and then you get answer for energy
Answer:
The vessel has 0.0913 moles of O₂. Therefore it has 5.49ₓ10²² molecules of O₂
Explanation:
Let's apply the Ideal Gases Law to solve this.
First of all, we convert the pressure from mmHg to atm
782 mmHg . 1 atm / 760 mmHg = 1.03 stm
We convert the volume from mL to L
2239 mL . 1L / 1000mL = 2.239L
and finally we convert T° C to K → 35°C + 273 = 308K
Formula is: P . V = n . R . T
1.03 atm . 2.239L = n . 0.082 L.atm/mol.K . 308K
n = 1.03 atm . 2.239L / 0.082 L.atm/mol.K . 308K → 0.0913 moles
Let's count the molecules → 0.0913 mol . 6.02ₓ10²³ molecules / 1 mol =
5.49ₓ10²² molecules
Thank you! same for u my friend! have an amazing life! :)
Alpha particles, also called alpha ray or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a <u>helium-4 nucleus. </u>They are generally produced in the process of alpha decay, but may also be produced in other ways.
Composition: 2 protons, 2 neutrons
Mass: 6.644657230(82)×10−27 kg; 4.0015061...
Electric charge: +2 e
Symbol: α, α2+, He2+