How many parts per million of lead is found in 250 ml of water if there is 1.30g of lead in the water? 1ml=1g

What is the force of attraction between the particles in a salt crystal

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

Look at the bean data from days 4–6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part