Can someone please help me answer these questions and I’ll give you brainlest

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

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

What are two radioactive isotopes that are used for dating rocks that are older than 10 million years