Answer:
Rubber is an insulator.
Remaining three are metals and hence conductors.
Hello,
I have attached a periodic table to allow you to further understand my answer. We know elements are categorized in groups of Metals, Nonmetals, and metalloids. Let’s analyze each element. Sulfur is a nonmetal which mean it does not conduct well and does not have a good appearance, the same applies to all the other non metals on this list, including sulfur and helium. Copper is our only answer in which it fits and electricity can pass through/conduct easily. So our answer is copper. I hope this helps you with your assignment.
Answer:
The unbalanced chemical equation: H₂O₂ → H₂O + O₂.
The balanced chemical equation: H₂O₂ → H₂O + 1/2O₂.
Explanation:
- Hydrogen peroxide is decomposed into oxygen and water, which is a slow reaction.
- It is can be catalyzed by using yeast.
The unbalanced chemical equation: H₂O₂ → H₂O + O₂.
The balanced chemical equation: H₂O₂ → H₂O + 1/2O₂.
1.0 mol of H₂O₂ is decomposed to 1.0 mol of H₂O and 0.5 mol of O₂.
Answer:
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Answer:
0.33 M
Explanation:
From the question given above, the following data were obtained:
Mass of K₂Cr₂O₇ = 9.67 g
Volume of solution = 100 mL
Molarity =?
Next, we shall determine the number of mole in 9.67 g of K₂Cr₂O₇. This can be obtained as follow:
Molar mass of K₂Cr₂O₇ = (39×2) + (52×2) + (16×7)
= 78 + 104 + 112
= 294 g/mol
Mass of K₂Cr₂O₇ = 9.67 g
Mole of K₂Cr₂O₇ =?
Mole = mass /Molar mass
Mole of K₂Cr₂O₇ = 9.67 / 294
Mole of K₂Cr₂O₇ = 0.033 mole
Next, we shall convert 100 mL to litre (L). This can be obtained as follow:
1000 mL = 1 L
100 mL = 100 mL × 1 L / 1000 mL
100 mL = 0.1 L
Finally, we shall determine the molarity of the solution. This can be obtained as follow:
Mole of K₂Cr₂O₇ = 0.033 mole
Volume of solution = 0.1 L
Molarity =?
Molarity = mole / Volume
Molarity = 0.033 / 0.1
Molarity = 0.33 M
Thus, the molarity of the solution is 0.33 M