The balanced chemical equation for reaction of and is as follows:
From the balanced chemical equation, 2 mol of reacts with 1 mol of .
First calculating number of moles of as follows:
On rearranging,
Here, M is molarity and V is volume. The molarity of is given 0.274 M or mol/L and volume 155 mL, putting the values,
Since, 1 mol of reacts with 2 mol of thus, number of moles of will be .
Now, molarity of is given 0.305 M or mol/L thus, volume can be calculated as follows:
Therefore, volume of is 278.5 mL.
Answer:
Explanation:
The algebraic sum of all the oxidation numbers of all atoms in a neutral compound is zero.
In order to know the formula of the negative Sulfur ion in pyrite, we must determine its oxidation state.
Let us make the make the oxidation number of sulfur = x
Therefore, FeS₂:
+2 +2x = 0
+2 = -2x
x = -1
The formula of the negative ion is S⁻
Answer:
12 moles of water (H₂O)
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
6CO₂ + 6H₂O —> C₆H₁₂O₆ + 6O₂
From the balanced equation above,
6 moles of H₂O reacted to produce 1 mole of C₆H₁₂O₆.
Finally, we shall determine the number of mole of H₂O required to produce 2 moles of C₆H₁₂O₆. This can be obtained as follow:
From the balanced equation above,
6 moles of H₂O reacted to produce 1 mole of C₆H₁₂O₆.
Therefore, Xmol of H₂O will react to produce 2 moles of C₆H₁₂O₆ i.e
Xmol of H₂O = 6 × 2
Xmol of H₂O = 12 moles.
Thus, 12 moles of water (H₂O) is needed to produce 2 moles of glucose (C₆H₁₂O₆).
B) is a right answer because molar mass equal molecular atomic mass meaning Ar(Na)=23 and so M(Na)=23 as well.
B is correct
Hope that helped