A certain weak base has a ������b of 7. 50×10−7. What concentration of this base will produce a ph of 10. 03?.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Is the idea of spontaneous generation supported by redi's experiment? justify your answer in 2-3 sentences?

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.