Answer:
use renewable energy hshehhdbdbdbd
Explanation:
I makes sense to pick option 2
21: potassium has 20 neutrons
22: is d
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>
A binary ionic compound is composed of ions of two different elements. One of which is a metal, and the other a non-metal
Because even a little can drastically change sea life as well as continents and other islands temperatures.