Determine the ph at the equivalence (stoichiometric) point in the titration of 40 ml of 0.16 m formic acid(aq) with 0.2 m naoh(aq). the ka of formic acid is 1.8 x 10-4.

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost