What mass of water (in grams) is necessary to convert 225g SiF4 to SiO2? SiF4 + 2H2O —> 4HF + SiO2

In which reaction is precipitation occurring?

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?