What is the lethal dose of chocolate

After cloud droplets form, what must happen to them for precipitation to occur?

0.09 moles of sodium sulfate in 12 ml of solution

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils