25.0cm3 of 0.020mol/dm3 sulphuric acid neutralises 18.6cm3 of barium hydroxide solution

1) find the concentration of the barium hydroxide solution in mol/dm3

2) find the concentration of the barium hydroxide solution in g/dm3

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

Consider this initial-rate data at a certain temperature for the reaction described by

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?