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n200080 [17]
4 years ago
12

All organisms use oxidation-reduction reactions to harness energy, and this newly harvested energy is used to produce atp. oxida

tion is defined as the loss of electrons. reduction is the gain of electrons. the energy in fuel molecules (often carbohydrates) is in the form of electrons. when electrons are removed from their high-energy state in fuel molecules (the electron donors), those molecules are oxidized. the electrons must be added to another molecule, which serves as the electron acceptor. as it gains electrons, the electron acceptor is reduced. when these electrons arrive at the final electron acceptor, they are at a lower-energy state compared to their original position in the electron donor. the goal is to harness the energy the electrons lose during this transfer process. in this activity, you will examine three equations and indicate which reactants are electron donors and which are receptors. in addition, you will identify the oxidized product and the reduced product
Chemistry
1 answer:
Ber [7]4 years ago
4 0
1. In first reaction reactant a is the electron donor, while b is the electron acceptor,
the oxidized product is c while the reduced product is d

2. in the second equation e is the electron donor, f is the electron acceptor
g is the oxidized product while h is the reduced product.

3. In the third reaction i is the electron donor, j is the electron acceptor , k is the oxidized product while l is the reduced product.
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Using the graphic provided,idenify the reactants of photosynthesis?
Y_Kistochka [10]

Answer:

water, carbon dioxide reacted in the presence of sun light and chlorophyll and form glucose and oxygen.

Explanation:

Photosynthesis:

It is the process in which in the presence of sun light and chlorophyll by using carbon dioxide and water plants produce the oxygen and glucose.

Carbon dioxide + water + energy →   glucose + oxygen

water is supplied through the roots, carbon dioxide collected through stomata and sun light is capture  by chloroplast.

Chemical equation:

6H₂O + 6CO₂ + energy  →   C₆H₁₂O₆ + 6O₂

it is known from balanced chemical equation that 6 moles of carbon dioxide react with the six moles of water so, the mass of water will be,

The glucose is converted into pyruvate and prod

7 0
4 years ago
4. Your mission, if you choose to accept it, is to make 10mmol/L acetate buffer, pH5.0. Beginning with 10mmol/L HAc, what concen
julia-pushkina [17]

Answer:

6,45mmol/L of NaOH you need to add to reach this pH.

Explanation:

CH₃COOH ⇄ CH₃COO⁻ + H⁺ <em>pka = 4,74</em>

Henderson-Hasselbalch equation for acetate buffer is:

5,0 = 4,74 + log₁₀\frac{[CH_{3}COO^-]}{[CH_{3}COOH]}

Solving:

1,82 = \frac{[CH_{3}COO^-]}{[CH_{3}COOH]} <em>(1)</em>

As total concentration of acetate buffer is:

10 mM = [CH₃COOH] + [CH₃COO⁻] <em>(2)</em>

Replacing (2) in (1)

<em>[CH₃COOH] = 3,55 mM</em>

And

<em>[CH₃COO⁻] = 6,45 mM</em>

Knowing that:

<em>CH₃COOH + NaOH → CH₃COO⁻ + Na⁺ + H₂O</em>

Having in the first 10mmol/L of CH₃COOH, you need to add <em>6,45 mmol/L of NaOH. </em>to obtain in the last 6,45mmol/L of CH₃COO⁻ and 3,55mmol/L of CH₃<em>COOH </em>.

I hope it helps!

7 0
3 years ago
Which statement concerning boric acid (H3BO3) is MOST accurate? A) Boric acid has a relatively high pH. B) Boric acid ionizes co
jonny [76]

Answer:

D) Dissociates very little in solution.

Explanation:

6 0
3 years ago
Hydrogen gas, H2, reacts explosively with gaseous chlorine, Cl2, to form hydrogen chloride, HCl(g). What is the enthalpy change
yuradex [85]

Answer:

ΔH°r = -184.6 kJ

Explanation:

Let's consider the following balanced equation.

H₂(g) + Cl₂(g) ⇄ 2 HCl(g)

We can calculate the standard enthalpy of the reaction (ΔH°r) using the following expression:

ΔH°r = ∑np . ΔH°f(p) - ∑nr . ΔH°f(r)

where,

ni are the moles of reactants and products

ΔH°f(p) are the standard enthalpies of formation of reactants and products

By definition, the standard enthalpy of formation of a simple substance in its most stable state is zero. Then,

ΔH°r = 2 mol × ΔH°f(HCl(g)) - [1 mol × ΔH°f(H₂(g)) + 1 mol × ΔH°f(Cl₂(g))]

ΔH°r = 2 mol × (-92.3 kJ/mol) - [1 mol × 0 + 1 mol × 0]

ΔH°r = -184.6 kJ

5 0
3 years ago
Estimate the volume, v, of one sodium atom (na) using its metallic radius of 186 pm. express your answer with the appropriate un
ludmilkaskok [199]
<span>2.70x10^7 pm^3 We will assume that the sodium atom closely approximates a sphere. So the expression for the volume of a sphere is V = 4/3 pi r^3 V = 4/3 pi (186 pm)^3 V = 4/3 pi 6434856 pm^3 V = 26954261.78 pm^3 Round to 3 significant figures, giving 2.70x10^7 pm^3</span>
4 0
3 years ago
Read 2 more answers
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