Answer:
coordination number
Explanation:
Coordination number -
In a crystal lattice , the number of atoms that are surrounded to a particular atom , is referred to as the coordination number of the crystal.
In the field of crystallography and chemistry , it is also called the ligancy.
In coordination chemistry , the number of ligands attached to the central metal atom is also known as the coordination number of the coordination compound.
Hence, from the given statement of the question,
The correct term is coordination number.
159.69g⋅5=798.45g that is the correct answer
I didn't understand your question at first, I believe an acceptable answer would be As and Ar.
As (arsenic) is a metalloid and Ar (argon) is a noble gas.
Hopefully I was able to help you! :)
Answer:
Concentration of Na₂SO₃ is 0.0533M
Explanation:
To obtain concentration of Na₂SO₃ it is necessary to obtain moles of primary standard, KIO₃ in the standarization:
0.4991g × (1mol / 214g) = 2.332x10⁻³ mol KIO₃ / 0.2500L = 9.329x10⁻³M
As you take 50.00mL of this solution, moles are:
0.05000L × (9.329x10⁻³mol / L) = <em>4.664x10⁻⁴ moles KIO₃</em>
Now, the reaction of Na₂SO₃ with KIO₃ is:
KIO₃(aq) + 3 Na₂SO₃(aq) → KI(aq) + 3 Na₂SO₄(aq)
That means 1 mole of KIO₃ reacts with 3 moles of Na₂SO₃. Thus, moles of Na₂SO₃ that reacts are:
4.664x10⁻⁴ moles KIO₃ × (3 mol Na₂SO₃ / 1 mol KIO₃) = <em>1.399x10⁻³ mol Na₂SO₃</em>
As 26.25mL of titrant were consumed, concentration of Na₂SO₃ is:
1.399x10⁻³ mol Na₂SO₃ / 0.02625L = <em>0.0533M</em>