The balanced chemical reaction is written as:
<span>4C(s) + S8(s) → 4CS2(l)
We are given the amount of carbon and sulfur to be used in the reaction. We need to determine first the limiting reactant to be able to solve this correctly.
</span>7.70 g C ( 1 mol / 12.01 g) =0.64 mol C
19.7 g S8 ( 1 mol / 256.48 g) = 0.08 mol S8
The limiting reactant would be S8. We use this amount to calculate.
0.08 mol S8 ( 4 mol CS2 / 1 mol S8 ) ( 256.48 g / 1 mol ) = 78.8 g CS2
I speak only english sorry
Answer:
Na₂SO₄
Explanation:
Assume that you have 100 g of the compound.
Then you have 32.37 g Na, 22.57 g S, and 45.05 g O.
1. Calculate the moles of each element.
Moles of Na = 32.37 × 1/22.99 = 1.408 mol Na
Moles of S = 22.57 × 1/32.06 = 0.7040 mol S
Moles of O = 45.05 × 1/16.00 = 2.816 mol O
2. Calculate the <em>molar ratio</em>s.
Divide all values by the smallest number.
Na: 1.408/0.7040 = 2.000
S: 0.7040/0.7040 = 1
O: 2.816/0.7040 = 4.000
3. Determine the empirical formula
Round off all numbers to the closest integer.
Na: 2
S: 1
O: 4
The empirical formula is Na₂SO₄.
Answer:
A
Explanation:
This is the only reaction where a element is displaced out of a solution and turn a soild, due to it been less reactive than the other causing its displacement The electrochemical series can be used as reference.