Answer is: 4·10⁻⁴ M.
pH (soft drink) = 3,4. This drink is acidic.
c(H₃O⁺) = ? - concentration of hydronium ion.
pH = -log c(H₃O⁺) ⇒ c(H₃O⁺) = 10∧-pH.
c(H₃O⁺) = 10⁻³·⁴.
c(H₃O⁺) = 4·10⁻⁴ M(mol/dm³).
pH (<span>potential of hydrogen) </span>i<span>s a numeric scale used to define the </span>acidity<span> or </span>basicity<span> of an </span>aqueous solution.
Answer:
d. K<1 E∘cell is negative
Explanation:
Since E⁰ = negative , ΔG = -nFE⁰ = -nF -ve = +ve.
Also, ΔG = -RTlnK
K = exp(-RTΔG)
Since ΔG = +ve, -RTΔG = -ve
K = 1/exp(RTΔG) < 1.
So our answer is E⁰ cell is negative and K < 1
Idrk i took chem last year but i didn’t get it
Answer:
Reduced, alkane
Explanation:
Wolf-Kishner reaction is a type of reduction reaction in which aldehydes and ketones are reduced to their corresponding alkane in the presence of a base.
This reaction occurs at high temperature.
Alkane formed has a same number of carbon as aldehyde and ketone.
If acetaldehyde undergoes a Wolf-Kishner reaction in the presence of base and heat, then ethane is formed. Nitrogen is formed as a byproduct.
Here, acetaldehyde is reduced to form ethane.
So, acetaldehyde undergoes a Wolf-Kishner reaction, which is the addition of hydrazine with subsequent addition of a base and heat. In this reaction, the aldehyde is reduced, resulting in alkane product.
Answer:
1. DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
2. both
Explanation: Since errors can occur when DNA replicates itself, mutations can occur in both asexually and sexually reproducing organisms.
