Calculate the number of protons in 24 gram of SO4^2- at STP
No I am talking about number of protons in whole molecule i.e., SO4^2- in terms of avogadro's number.
Hmmm??? I thought elements were defined by their atomic numbers ( => # protons) regardless of the isotope. That is, all sulfur isotopes have 16 protons and all oxygen isotopes have 8 protons. The difference is in the number of neutrons which is not the objective of the posted problem. So ...
#p⁺ in 24-g SO₄ˉ² = (1(16) + 4(8)- p⁺/molecule)(6.02 x 10²⁴ molecules/mole) (24-g/98-g/mol) = 7.08 x 10²⁵ p⁺ regardless of the isotopic composition.
Thanks Doc48....
I want that only
To calculate the number of protons in 24 grams of SO4^2- at STP, we first need to understand the atomic structure of sulfur (S), oxygen (O), and the sulfate ion (SO4^2-).
Sulfur (S) has an atomic number of 16, which means it has 16 protons in its nucleus.
Oxygen (O) has an atomic number of 8, which means it has 8 protons in its nucleus.
The sulfate ion (SO4^2-) consists of one sulfur atom and four oxygen atoms bonded together. The ^2- charge indicates that the ion has two extra electrons, giving it a net charge of -2. Since electrons have negligible mass compared to protons, we can ignore their weight when calculating the mass and number of protons.
The molecular weight of SO4^2- can be calculated by adding up the atomic weights of each element in the formula:
(Mass of Sulfur) + (4 x Mass of Oxygen) = (32.07 g/mol) + (4 x 16.00 g/mol) = 96.07 g/mol
Next, we utilize the molar mass of SO4^2- to determine the number of moles in 24 grams:
Number of moles = (Mass of substance) / (Molar mass of substance)
Number of moles = 24 g / 96.07 g/mol = 0.2498 mol
Finally, to find the number of protons in this quantity of SO4^2-, we need to multiply the number of moles by Avogadro's number, which is approximately 6.022 x 10^23 protons/mol:
Number of protons = (Number of moles) x (Avogadro's number)
Number of protons = 0.2498 mol x (6.022 x 10^23 protons/mol) ≈ 1.5 x 10^23 protons
Therefore, there are approximately 1.5 x 10^23 protons in 24 grams of SO4^2- at STP.
How many moles SO4^2- do you have. That is
mols = grams/molar mass = approx 24/96 = about 0.25
In 1 mol SO4^2- you have 16 protons in S and 8 protons in each oxygen which is a total of 16 + 4(8) = 48. So how many will you have in 0.25 mol? By the way, I assume you are talking about so-called "pure S and pure O); i.e., no isotopes which means we are talking about S-32 and O-16