Which of the following describes qualitative data

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

What is the main reason why some developing countries fear the increase the free trade policies around the world?

Calculate the mass of 0.750 mol of the following substance. na3po4.