20.0 cm3 of dilute nitric acid was put in a flask. Potassium hydroxide solution (concentration 1.0 mol/dm3) was added from a burette.
The mean volume of potassium hydroxide used in the titration was 26.5 cm3. What was the concentration of the acid?

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?