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natima [27]
3 years ago
9

Determine the empirical formula of an oxide of iron, which has 69.9% iron and 30.1% dioxygen by mass.​

Chemistry
1 answer:
Zina [86]3 years ago
4 0

Answer:

again same questions

i think its from 1st chapter

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Write a balanced half-reaction for the oxidation of solid manganese dioxide to permanganate ion in basic aqueous solution. Be su
AlexFokin [52]

Answer:

8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l) + 7 e⁻

Explanation:

Let's consider the following oxidation half-reaction that takes place in basic aqueous solution.

Mn(s) ⇒ MnO₄⁻(aq)

First, we will perform the mass balance. We will add 4 H₂O to the products side and 8 OH⁻ to the reactants side.

8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l)

Finally, we will perform the charge balance by adding 7 electrons to the products side.

8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l) + 7 e⁻

3 0
3 years ago
The winter solstice is the shortest day of the year in the northern hemisphere. Please select the best answer from the choices p
Natalka [10]

Answer: The given statement is true.

Explanation:

Winter solstice is day at the hemispheres where day light is for shortest period and night longs for longest period. It is December 20 on northern hemisphere and 20 June on southern hemisphere.

During this time sun is farthest from the earth's both hemispheres.

Hence, the given statement is true.

5 0
4 years ago
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How many moles will 1.875×10*4 cm*3 of a substance Y have ?​
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the volume will be 0.84mol of Y

6 0
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A flower pot with a mass of 10 kg is sitting on a window sill 30 m from the ground. Is the energy of the flower pot potential or
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Answer:

25

Explanation:

i think not sure ..................

7 0
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Which of these is the main difference between aerobic respiration and anaerobic respiration?
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Anaerobic Respiration

It can be found only in the cytoplasmic.

Glucose breaks down into ethyl alcohol, carbon dioxide and energy

6 0
3 years ago
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