Ofc porcelain crucible is a high efficiency material and It can be used as a test piece, retort, but the most common use is as a smelting vessel which is used in furnaces or fire with direct flame.
Answer:
Place two of them as reactants.
Explanation:
- We have the two steps of reactions:
1) N₂(g ) + O₂(g) → 2NO(g).
2) 2NO(g )+ O₂(g) → 2NO₂(g).
- Adding the two equation with cancelling the intermediate (NO), we get:
<em>N₂(g ) + 2O₂(g) → 2NO₂(g).</em>
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NO is cancelled out because there is one in each equation in the products side in eq. 1 and in oriduct side in eq. 2.
<em>So, we place two of oxygen as reactants.</em>
Answer:
58.9mL
Explanation:
Given parameters:
Initial volume = 34.3mL = 0.0343dm³
Initial concentration = 1.72mM = 1.72 x 10⁻³moldm⁻³
Final concentration = 1.00mM = 1 x 10⁻³ moldm⁻³
Unknown:
Final volume =?
Solution:
Often times, the concentration of a standard solution may have to be diluted to a lower one by adding distilled water. To find the find the final volume, we must recognize that the number of moles of the substance in initial and final solutions are the same.
Therefore;
C₁V₁ = C₂V₂
where C and V are concentration and 1 and 2 are initial and final states.
now input the variables;
1.72 x 10⁻³ x 0.0343 = 1 x 10⁻³ x V₂
V₂ = 0.0589dm³ = 58.9mL
Answer:
compound is formed .............
