What type of reaction is shown here?
1 answer:
Answer:
A:Double replacement
Explanation:
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Answer:
2.1mol/L
Explanation:
Number of moles = 0.21 moles
Volume = 0.1L
Molarity of a substance is the number of moles of solute dissolved in a volume of solvent (L)
Molarity = number of moles / volume of solvent
Molarity = 0.21 / 0.1
Molarity = 2.1mol/L
Mass using grams because of the balance scale is evenly weighted not from springs and gravity like a normal scale.
Answer:
21.0 g.
Explanation:
- Firstly, It is considered as a stichiometry problem.
- From the balanced equation: Fe₂O₃ + 3CO → 2Fe + 3CO₂.
- It is clear that the stichiometry shows that 1.0 moles of Fe₂O3 reacts with 3.0 moles of CO to give 2.0 moles of Fe and 3.0 moles of CO₂.
- We must convert the grams of Fe (27.9 g) to moles<em> (n = mass/Atomic mass)</em>.
- n = (27.9 g) / (55.845 g/mole) = 0.499 ≅ 0.50 moles.
- Now, we can get the number of moles of CO that is needed to produce 0.50 moles of Fe.
- <u><em>Using cross multiplication:</em></u>
- 3.0 moles of CO → 2.0 moles of Fe, <em>from the stichiometry of the balanced equation</em>.
- ??? moles of CO → 0.50 moles of Fe
- The number of moles of CO that will produce 0.50 moles of Fe <em>(27.9 g)</em> is (3.0 x 0.50 / 2.0) = 0.75 moles.
- Finally, we should convert the number of moles of CO into grams (n = mass/molar mass).
- <em>Molar mass of CO = 28.01 g/mole.</em>
- <em>mass</em><em> = n x molar mass = (0.75 x 28.01) = </em><em>21.0 g</em><em>.</em>
RESPOSTA E 8, PARA BALANCEAR O OXIGENIO
Answer:
Yesssssss , option two is the correct one click it buddy
Explanation: