A 50.0 g piece of unknown metal, initially at 200°C, is set into 200g of ethanol, initially at 23.0°C. The final temperature is 40°C. What is the specific heat of the metal?

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 happens to isotopes that are unstable?

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?