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Find the slope at t = 40, points (0, 0.48) and (70, 0.24).
Slope= Δy= (0.24 – 0.48)=– 0.0034 M/s
Δx(70 – 0)
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(the negative represent direction so the answer is positive)</span>
Answer:
21.3 g of dinitrogen tetrafluoride are formed by this reaction
Explanation:
First of all, we need to determine the reaction:
2NH₃ + 5F₂ → N₂F₄ + 6HF
2 moles of ammonia react with 5 moles of F₂ in order to make 1 mol of dinitrogen tetrafluoride and hydrogen fluoride
As we only have the ammonia's mass, then the fluorine gas is the excess reagent.
We convert ammonia's mass to moles → 7 g / 17g/mol = 0.411 moles
Ratio is 2:1. 2 moles of ammonia produce 1 mol of tetrafluoride
Therefore, 0.411 moles will produce (0.411 . 1) / 2 = 0.205 moles of tetrafluoride
Let's convert the mass to moles: 0.205 mol . 104.01 g / 1mol = 21.3 g