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Veronika [31]
3 years ago
11

5Fe2 2Mn2 8H2O2MnO4- 5Fe 16H In the above reaction, the oxidation state of iron changes from to . How many electrons are transfe

rred in the reaction?
Chemistry
1 answer:
Ostrovityanka [42]3 years ago
5 0

Answer:

The oxidation number of iron changes from 2+ to 0.

10 electrons are transferred in the reaction.

Explanation:

Step 1: Write the balanced redox reaction

5 Fe²⁺ + 2 Mn²⁺ + 8 H₂O ⇒ 2 MnO₄⁻ + 5 Fe + 16 H⁺

Step 2: identify both half-reactions

Reduction: 5 Fe²⁺ + 10 e⁻ ⇒ 5 Fe

Oxidation: 2 Mn²⁺ + 8 H₂O ⇒ 2 MnO₄⁻ + 16 H⁺ + 10 e⁻

Step 3: Identify the oxidation state change of iron

Iron changes from Fe²⁺ to Fe, that is, the oxidation number changes from 2+ to 0.

Step 4: Determine how many electrons are transferred in the reaction?

According to both balanced half-reactions, 10 electrons are transferred in the reaction.

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Two species of frog mate in the same pond. One breeds in early summer and one in late summer. This is an example of what kind of
MatroZZZ [7]

Answer:

Pre-zygotic, temporal separation

Explanation:

Reproductive isolation mechanism is of two types:

  • Prezygotic mechanism
  • Postzygotic mechanism

Prezygotic mechanism isolation occurs before fertilization and helpful in preventing formation of fertile offspring.

In frog external fertilization occurs. In the external fertilization, eggs and sperms are released in water and fertilization occur outside the water.

Prezygotic isolating mechanisms may include behavioral isolation, temporal isolation, mechanical isolation, gametic isolation and habitat isolation.

Temporal separation in reproduction is the sexual activity in the same geographical range but in different periods.

Therefore, the given reproductive isolation is pre-zygotic, temporal separation.

4 0
3 years ago
A tall pea plant (Tt) is crossbred with another tall pea plant (Tt). The following Punnett square shows the separated alleles fo
Luba_88 [7]

Answer:

B.

Explanation:

when you use punnett squares, you cross the different genes with themselves. if T is in the first box on both sides, the genome will be TT. if the box lines up to tt, it will be tt. the boxes on the left use the genes' first letter and the boxes on the right use the second letter.

7 0
3 years ago
Read 2 more answers
Pure substances include
eduard
B. elements and compounds
4 0
3 years ago
Chloroform is a liquid once used for anesthetic. What is the volume of 5.0 g of chloroform? The density of chloroform 1.49 g/mL
mario62 [17]

Answer:

3.3557047 mL

Explanation:

The density can be found using the following formula:

d=\frac{m}{v}

Let's rearrange the formula to find the volume, v.

d*v=\frac{m}{v}*v

d*v=m

\frac{d*v}{d} =\frac{m}{d}

v=\frac{m}{d}

The volume can be found by dividing the mass by the density. The mass of the chloroform is 5 grams and the density is 1.49 grams per milliliter. Therefore,

m= 5g \\d= 1.49 g/mL

Substitute the values into the formula.

v=\frac{5g}{1.49 g/mL}

Divide. When we divide, the grams, or g, in the numerator and denominator will cancel out.

v= \frac{5}{1.49}mL

v=3.3557047 mL

The volume of 5 grams of chloroform is 3.3557047 milliliters

4 0
3 years ago
When glucose is fermented, ethanol is formed together with ………………….
levacccp [35]

Answer:

carbon dioxide and oxygen

3 0
3 years ago
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