0.158g of barium halide is completely reacted with H2So4 and 0.124g of BaSO4 is collected. Whats the identity of X for this barium halide

Which statement can best be concluded from the ideal gas law?

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

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.