If you had 5g of iron and 10g of iron ,which chunk of iron would be attached to a magnet

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

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.

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