Answer:
pH = 9.29
Explanation:
- C5H5N + H2O ↔ C5H5NH+ + OH-
∴ pKb = 8.75 = - Log Kb
⇒ Kb = 1.7783 E-9 = [OH-][C5H5NH+]/[C5H5N]
mass balance:
⇒ <em>C</em> C5H5N = 0.215 M = [ C5H5N ] + [C5H5NH+]
charge balance:
⇒ [OH-] = [C5H5NH+]
⇒ Kb = 1.7783 E-9 = [OH-]² / ( 0.215 - [OH-] )
⇒ [ OH-]² + 1.7783 E-9[OH-] - 3.8233 E-10 = 0
⇒ [OH-] = 1.9552 E-5 M
⇒ pOH = 4.708
∴ 14 = pH + pOH
⇒ pH = 9.29
Answer:
2.0 x 10⁻³ M/s.
Explanation:
- The rate of the reaction is the change of the concentration of the reactants or the products with time.
<em>The rate of the reaction = - Δ[reactants]/Δt = - [(0.6 M - 1.8 M)]/(580 s - 0 s) = 2.069 x 10⁻³ M/s.</em>
<u>Answer:</u> The net ionic equation is given below.
<u>Explanation:</u>
Net ionic equation of any reaction does not include any spectator ions.
These ions are defined as the ions which does not get involved in a chemical equation. They are found on both the sides of the chemical reaction when it is present in ionic form.
The chemical equation for the reaction of hydrochloric acid and potassium carbonate is given as:
Ionic form of the above equation follows:
As, potassium and chloride ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation.
The net ionic equation for the above reaction follows:
Hence, the net ionic equation is given above.
The answer is:
2.5 moles
The explanation:
when avogadro's number = 6.02 * 10^23
and when 1 mole of the sample will give → 6.02*10^23 atoms
So, ??? mole of the sample will give→ 1.52 x 10^24 atoms
∴ number of moles = (1.52 X 10^24) * 1 mole / (6.02X10^23)
= 2.5 moles
Answer: Cell components encompass phagocytic cells, epithelial and endothelial cells, natural killer cells, innate lymphoid cells, and platelets.
Explanation: Although it is ancient, the innate immune system is highly complex and consists of barriers to infection (epithelia of skin, gastrointestinal, respiratory, genitourinary tracts), antimicrobial peptides and proteins, humoral components (i.e. complement and opsonins) and cellular components (i.e. neutrophils, monocytes).
