What keeps the planets in orbit in our solar system

Arrange the species according to the oxidation state of nitrogen in each. Note that highest refers to the most positive oxidatio

castortr0y [4]

Answer:

A. NO₃⁻ ⇒ +5

B. NO₄⁺ ⇒ +9

C. N₂ ⇒ 0

D. NH₂OH ⇒ -1

E. NO₂⁻ ⇒ +3

Explanation:

To calculate the oxidation number of an element in a compound, we have to know the oxidation number of the other elements. Then, we have to consider that the sum of the oxidation number of each atom multiplied by the subscripts is equal to the net charge of the compound.

A. NO₃⁻

This is the ion nitrate. Oxygen atoms (O) has an oxidation number of -2 because it derives from an oxide. In this case, the net charge of the ion is -1. Thus, we calculate the oxidation number of N as follows:

N + (3 x (-2)) = -1

N - 6 = -1 ⇒ N= -1 + 6 = +5

B. NO₄⁺

In this case, the sum of the oxidation numbers of O and N multiplied by the subscripts is equal to +1:

N + (4 x (-2)) = +1

N - 8 = +1 ⇒ N = +1 +8 = +9

C. N₂

The oxidation number of N is 0 because N₂ is an elemental substance.

D. NH₂OH

The oxidation number of H is +1 and -2 for O. The net charge of the molecule is 0.

N + (H x 3) + (O) = 0

N + (+1 x 3) + (-2) = 0

N + 3 -2 = 0 ⇒ N = 2 - 3 = -1

E. NO₂⁻

The net charge of the ion nitrite is -1.

N + (2 x O) = -1

N + (2 x (-2)) = -1 ⇒ N = -1 + 4 = +3

Therefore:

Highest oxidation number = B. NO₄⁺ (+9)

Lowest oxidation number = D. NH₂OH (-1)

3 0

2 years ago

A reaction that is considered fast is likely to have which of the following characteristics?

Alexxx [7]

Answer:

I believe it's either a or b but I'm pretty sure that it's a

5 0

3 years ago

Griffin was walking to school one day and found a old bone. He took it to a scientist friend of his, and after studying the bone

svet-max [94.6K]

This problem is easily solvable because radioactivity equations are common and well-established. The pseudo-first reaction is written below:

A = A₀(1/2)^(t/h)
where
A is the final amount
A₀ is the original amount
t is the time
h is the half life

5,000 = A₀(1/2)^(24,000/6,000)
Solving for A₀,
<em>A₀ = 80,000 atoms</em>

6 0

3 years ago

What are middle-latitude cyclones?

dedylja [7]

your answer is B low-pressure systems that cause stormy weather

8 0

3 years ago

1. Classify each of the following as a homogeneous or heterogeneous substance.

Olegator [25]

a. iron ore - heterogeneous substance

(it contains a mixture of iron oxides)

b. quartz - homogeneous substance

(it is the crystalline silicon dioxide SiO₂, which is a very pure form of SiO₂)

c. granite - heterogeneous substance

(it as mixture of different oxides, mainly aluminium and silicon oxides)

d. energy drink - heterogeneous substance

(a mixture of water, sugar, carbon dioxide and different substances that may boost concentration, like caffeine)

e. oil-and-vinegar salad dressing - heterogeneous substance

(this salad dressing of oil and vinegar is composed of unsaturated triglycerides, acetic acid and water)

f. salt - homogeneous substance

(sodium chloride NaCl)

g. rainwater - homogeneous substance

(assuming the the atmosphere is clean, it is just pure water H₂O)

h. nitrogen - homogeneous substance

(it is the main component of air and it is a diatomic molecule N₂)

7 0

3 years ago

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