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NH3 is a weak base (Kb = 1.8 x 10-5), and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.068 M in NH4Cl at 25 degrees Celsius? NH3 is a weak base (Kb = 1.8 x 10...
Explain why A is more acidic than C, the conjugate acid of pyridine. Explain why when a strong acid is added to a mixture of a weak acid and its conjugate base, the pH changes only slowly. Also, explain why this effect does not persist indefinitely. ...
Which one of the following is a weak acid? a. H2SO4 b. HI c. HBr d. HF e. HClO4 Acid Strength: Acids can be strong, in which they fully dissociate in water to make the same concentration of hydronium ions as the concentration of acid, or they can be wea...
From the following hydronium concentrations, calculate the hydroxide concentration present. (a) (H_3O^+)=2.0 x 10^{-8} M (b) (H_3O^+)=1.5 x 10^{-15} M Ammonia is a weak base with the formula NH3. The Kb for amm...
This may be because genome size has a weak correlation with cellular mass13. Although genome size is likely to positively correlate with lifespan in birds18 and fish19, some skepticism exists regarding the importance of genome size in fish (or homeotherms)20. In short, the association of ...
ET‐18‐O‐CH3‐induced apoptosis is causally linked to COX‐2 upregulation in H‐ras transformed human breast epithelial cells H Na,H Inoue,Y Surh - 《Febs Letters》 被引量: 0发表: 2005年 The antitumor ether lipid edelfosine (ET-18-O-CH3) induces apoptosis in H-ras transformed human...
doi:10.1016/0009-2614(92)85078-OWe consider incommensurate inclusion compounds comprising linear alkane (CH3(CH2)nCH3) guest molecules included within a one-dimensional host channel, and investigate, via mathematical analysis, the relationship between the optimum periodic repeat distance (cg(n)) of ...
and sometimes refractory disease with a disappointing low survival rate and weak prognosis. The 5-year survival rate for AML is only about 30%. However, the survival rate seems to be age-dependent. Novel CAR T cell therapy is a light at the end of the tunnel. The CD19 is an important...
Analysis returns ϕCH3OH = (6 ± 2)% (see Fig. 2b), indicating, even allowing for a possible kinetic isotope effect, at most a weak negative pressure dependence in the methanol branching fraction, consistent with calculations18. Continuous photolysis chamber experiments Reactions were ...