All categories

3 years ago

ASAAAP HURRRY PLS!!!

Chemistry

2 answers:

lesya692 [45]3 years ago

6 0

It’s D! at the beginning of the electron transport chain, the oxygen is oxidized.

Setler79 [48]3 years ago

3 0

C or D! When reduced coenzymes produce in the process of the cycle, are oxidized in the process of oxidative phosphorylation in electron transport chain! I hope this helps :(

You might be interested in

Sodium is dissolved under kerosene oil or paroffin to protect it from the air. 3) State. Huckle's rule for aromaticity with exam

lapo4ka [179]

Answer:

His rule states that if a cyclic, planar molecule has 4n+2 π electrons

3 0

3 years ago

Please help I’ll mark brainliest :)

DerKrebs [107]

Answer:

Biotechnology is the use of living organisms through modification to make products of technological or industrial significance.

positively, biotechnology can be used in manufacture of medicine and also synthetic forms of various hormones for use in the health and medical field.

negatively biotechnology may be manipulated for use in wars as biological warfare that can lead to loss of lives and environmental degradation

Explanation:

4 0

3 years ago

Read 2 more answers

If the K a Ka of a monoprotic weak acid is 7.3 × 10 − 6 , 7.3×10−6, what is the pH pH of a 0.40 M 0.40 M solution of this acid?

olga_2 [115]

Answer:

pH =3.8

Explanation:

Lets call the monoprotic weak acid HA, the dissociation equilibria in water will be:

HA + H₂O ⇄ H₃O⁺ + A⁻ with Ka = [ H₃O⁺] x [A⁻]/ [HA]

The pH is the negative log of the H₃O⁺ concentration, we know the equilibrium constant, Ka and the original acid concentration. So we will need to find the [H₃O⁺] to solve this question.

In order to do that lets set up the ICE table helper which accounts for the species at equilibrium:

HA H₃O⁺ A⁻

Initial, M 0.40 0 0

Change , M -x +x +x

Equilibrium, M 0.40 - x x x

Lets express these concentrations in terms of the equilibrium constant:

Ka = x² / (0.40 - x )

Now the equilibrium constant is so small ( very little dissociation of HA ) that is safe to approximate 0.40 - x to 0.40,

7.3 x 10⁻⁶ = x² / 0.40 ⇒ x = √( 7.3 x 10⁻⁶ x 0.40 ) = 1.71 x 10⁻³

[H₃O⁺] = 1.71 x 10⁻³

Indeed 1.71 x 10⁻³ is small compared to 0.40 (0.4 %). To be a good approximation our value should be less or equal to 5 %.

pH = - log ( 1.71 x 10⁻³ ) = 3.8

Note: when the aprroximation is greater than 5 % we will need to solve the resulting quadratic equation.

4 0

3 years ago

Which law is associated with interia

victus00 [196]

The law is Newton's first law or called the law of inertia; Which just means that an object at rest stays at rest and an object in motion stays in motion and continues at the same speed and in the same direction unless acted upon by an outside force force.

5 0

3 years ago

Suppose 2.2 g of hydrochloric acid is mixed with 1.61 g of sodium hydroxide. Calculate the maximum mass of sodium chloride that

kaheart [24]

Answer:

We can produce 2.35 grams sodium chloride

Explanation:

Step 1: Data given

Mass of hydrochloric acid = 2.2 grams

Molar mass of hydrochloric acid (HCl)= 36.46 g/mol

Mass of sodium hydroxide = 1.61 grams

Molar mass of sodium hydroxide = 40.0 g/mol

Step 2: The balanced equation

HCl + NaOH → NaCl + H2O

Step 3: Calculate moles HCl

Moles HCl = mass HCl / molar mass HCl

Moles HCl = 2.2 grams / 36.46 g/mol

Moles HCl = 0.0603 moles

Step 4: Calculate moles NaOH

Moles NaOH = 1.61 grams / 40.0 g/mol

Moles NaOH = 0.0403 moles

Step 5: Calculate the limiting reactant

NaOH is the limiting reactant. It will completely be consumed (0.0403 moles). HCl is in excess. There will react 0.04025 moles. There will remain 0.0603 -0.0403 = 0.0200 moles

Step 6: Calculate moles sodium chloride

For 1 mol HCl we need 1 mol NaOH to produce 1 mol NaCl and 1 mol H2O

For 0.0403 moles NaOH we'll have 0.0403 moles NaCl

Step 7: Calculate mass NaCl

Mass NaCl = moles NaCl * molar mass NaCl

Mass NaCl = 0.0403 moles * 58.44 g/mol

Mass NaCl = 2.35 grams

We can produce 2.35 grams sodium chloride

8 0

4 years ago