A solution is made by dissolving 0.40 g of solid sodium hydroxide in 250cm of water. It is found that 28.2 cm of this solution is needed to completely neutralise a 40.0cm sample of ethanoic acid (CH3COOH) of unknown
concentration.
Calculate the concentration of ethanoic acid.

A650 ml sodium bromine solution has a bromide ion concentration of 0.245 m. what is the mass (g) of sodium bromide in solution? a) 103.b)0.00155.c)16400.d) 16.4.e) 0.159

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

Heat is the total potential energy of a substance that can be transferred. true false