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Stella [2.4K]
3 years ago
14

"There are three different types of Olympic medals: gold, silver, and bronze. Which scale of measurement describes the different

types of medals?
Chemistry
1 answer:
soldi70 [24.7K]3 years ago
8 0

Answer:

ordinal

Explanation:

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What is the oxidation state of each element in SO4(2–)?
nikklg [1K]

Answer:

The oxidation state of sulfur, S, is +6, and the oxidation state of oxygen, O, is - 2:

  • S: 6+
  • O: 2-

Explanation:

Application of rules

1. <u>Ion SO₄²⁻</u>

In a neutral compound, the sum of the oxidation states of all the atoms that constitute the compound is equal to zero. In ions the sum of the oxidation states of the atoms is equal to the charge of the ion.

  • In this case, the ion SO₄²⁻ has charge negative 2: - 2

<u>2. Oxygen</u>

With the exception of the peroxides, when oxygen is combined with other elements, it always has oxidation state - 2.

Hence, the total charge of the four atoms of oxygen in SO₄²⁻ is 4×(-2) = - 8.

<u>3. Sulfur</u>

Therefore, naming x the unknown oxidation state of S, you can set this equation:

  • x + ( - 8) = - 2
  • ⇒ x = - 2- ( - 8) = - 2 + 8 = + 6

Conclusion

  • In SO₄²⁻, the oxidation state of sulfur, S, is +6, and the oxidation state of oxygen, O, is - 2.
3 0
3 years ago
The activation energy of a certain uncatalyzed biochemical reaction is 50.0 kJ/mol. In the presence of a catalyst at 37°C, the r
rodikova [14]

Answer:

E₁ ≅ 28.96 kJ/mol

Explanation:

Given that:

The activation energy of a certain uncatalyzed biochemical reaction is 50.0 kJ/mol,

Let the activation energy for a catalyzed biochemical reaction = E₁

E₁ = ??? (unknown)

Let the activation energy for an uncatalyzed biochemical reaction = E₂

E₂ = 50.0 kJ/mol

    = 50,000 J/mol

Temperature (T) = 37°C

= (37+273.15)K

= 310.15K

Rate constant (R) = 8.314 J/mol/k

Also, let the constant rate for the catalyzed biochemical reaction = K₁

let the constant rate for the uncatalyzed biochemical reaction = K₂

If the  rate constant for the reaction increases by a factor of 3.50 × 10³ as compared with the uncatalyzed reaction, That implies that:

K₁ = 3.50 × 10³

K₂ = 1

Now, to calculate the activation energy for the catalyzed reaction going by the following above parameter;

we can use the formula for Arrhenius equation;

K=Ae^{\frac{-E}{RT}}

If K_1=Ae^{\frac{-E_1}{RT}} -------equation 1     &

K_2=Ae^{\frac{-E_2}{RT}} -------equation 2

\frac{K_1}{K_2} = e^{\frac{-E_1-E_2}{RT}

E_1= E_2-RT*In(\frac{K_1}{K_2})

E_1= 50,000-8.314*310.15*In(\frac{3.50*10^3}{1})

E_1 = 28957.39292  J/mol

E₁ ≅ 28.96 kJ/mol

∴ the activation energy for a catalyzed biochemical reaction (E₁) = 28.96 kJ/mol

8 0
3 years ago
During conduction, thermal energy is transferred randomly between fast-moving and slow-moving particles during particle collisio
Aliun [14]

Answer:

c-from last moving to slow-moving particle during particle collision

Explanation:

during conduction, thermal energy is transferred

8 0
3 years ago
Read 2 more answers
20 pts. I am making holiday cookies and the recipe says that it will make 48 cookies. After eating some raw cookie dough I bake
Nikitich [7]
Check the attached file for the answer.

5 0
3 years ago
Is beans in water a suspension colloid or solution
Usimov [2.4K]

Answer:

The CORRECT answer is Solution

Explanation:

Since a Colloid is a liquid like substance that cannot be removed from other solids the only possible choice would be a Solution. becuase with a solution you can drain the solution and still get the beans.

8 0
3 years ago
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