What is the mass number of Carbon–12, which has 6 protons and 6 neutrons?
1 answer:
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Answer:
Explanation:
An empirical formula shows the smallest whole-number ratio of the atoms in a compound.
So, we must calculate this ratio. Since we are given the amounts of the elements in moles, we can do this in just 2 steps.
<h3>1. Divide </h3>The first step is division. We divide the amount of moles for both elements by the <u>smallest amount of moles</u>.
There are 0.300 moles of sulfur and 0.900 moles of oxygen. 0.300 is smaller, so we divide both amounts by 0.300
- Sulfur: 0.300/0.300= 1
- Oxygen: 0.900/0.300= 3
The next step is writing the formula. We use the numbers we just found as the subscripts. These numbers go after the element's symbol in the formula. Remember sulfur is S and there is 1 mole and oxygen is O and there are 3 moles.
- S₁O₃
This formula is technically correct, but we typically remove subscripts of 1 because no subscript implies 1 representative unit.
- SO₃
Answer:
The voltage is
Explanation:
Generally the half reaction for Zn, Zn2 half-cell is mathematically represented as
⇔
(reference study academy)
and the electric potential for this is a constant value
Generally the half reaction for Al, Al3 half-cell is mathematically represented as
⇔
and the electric potential for this is constant value
Therefore the cell potential for an electrochemical cell is mathematically represented as
substituting values