How do you know if a compound aqeous?

What is meteorological balloon that is filled with gas ligther than air? Why is an atom not really in invisible? How many Watts in 200 Volt? What do you think tools at a seismic center are designed to measure? What are the dates of Mt Fuji's eruptions? What metal is the most reactive metals in it's period and cannot be found in uncombined in nature. Each atom of the element contains 19 protons? What Wisconsin town is halfway between the north pole and equator? What modern movements led to new ways of studying and thinking about the natural world? What were some Positives and negatives about the Nile river? What and how is a volcano formed? How is a small scale map different from a large scale map in points? What effects does extreme weather have on world regions? How many number of ions are present in 30g of BaCl2? How could sumerians get the materials for tools and building? How have phreatophytes adapted to survive? What is vaccume freeze drying? What are the two types of movement possible at your knee? Which part of human body recovers quickly? In which state is the world's largest canyon? Is linseed oil saturated?