2mno₄ - (aq) + 5 c₂o₄²⁻ (aq) + 16 h⁺ (aq) → 2 mn²⁺ (aq) + 10 co₂ (g) + 8 h₂o (l)permanganate and oxalate ions react in an acidified solution according to the balanced equation above. how many moles of co₂(g) are produced when 20. ml of acidified 0.20 m kmno₄ solution is added to 50. ml of 0.10 m na₂c₂o₄ solution?

The produced moles are 1,0×10⁻²CO₂.

Explanation:

The first thing we should know is what reagent is the limiting one. To know this, it is necessary to obtain moles, thus:

0,020 KMnO₄ liters  × = 4,0×10⁻³ KMnO₄ moles

0,050 Na₂C₂O₄ liters  × = 5,0×10⁻³  Na₂C₂O₄ moles

The global reaction is:

2 MnO₄⁻ (aq) + 5 C₂O₄²⁻ (aq) + 16 H⁺ (aq) → 2 Mn²⁺ (aq) + 10 CO₂ (g) + 8 H₂O

Thus, two moles of MnO₄⁻ reacts with five moles of C₂O₄²⁻. It means that for a complete reaction of 4,0×10⁻³ KMnO₄ moles you need:

4,0×10⁻³ KMnO₄ moles × =

1,0×10⁻²Na₂C₂O₄ moles but there are just 5,0×10⁻³  Na₂C₂O₄ moles. Thus, limiting reagent is Na₂C₂O₄.

Now, the produced CO₂ moles are calculated with the limiting reagent moles, knowing that 5 C₂O₄⁻ moles produce 10 CO₂ moles, thus:

5,0×10⁻³  Na₂C₂O₄ moles × =

1,0×10⁻²CO₂ moles

I hope it helps!

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

b.

the accuracy of the data.