An impure sample contains 3.2 edm On titration, 25.0 cm of the solution reacted
0.10 moldm ethanoic acid. Calculate the percentage purity
sample of sodium hydroxide.
[NaOH = 40]
NaOH(aq) + CH3COOH(aq)
CH3COONaq) + H20​

Which metals are called noble metals

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

The primary products of complete combustion of fossil fuels are a. carbon dioxide and water b. methane and water c. carbon monoxide and water d. carbon dioxide and carbon monoxide