If 29. 0 g of potassium reacts with 66. 5 g of barium nitride, what mass of potassium nitride will be produced?.

Which characteristic demonstrates a healthy self-esteem? accepts others does not listen well seeks constant approval frustrates easily

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.