Sio2 + 4hf = sif4 + 2h2o, what mass of hf is necessary to produce 12.91g of the sif4?

mass HF = 9.928 g

Explanation:

∴ Mw SiO4 = 104.0791 g/mol

∴ Mw HF = 20.01 g/mol

⇒ mol HF = 12.91 gSiF4 * (mol SiF4 / 104.0791 g) * (4 mol HF / mol SIF4) = 0.496 mol

⇒ mass HF = 0.496 mol HF * ( 20.01 g HF / mol HF ) = 9.928 g HF

the answer is: they rebelled against saddam hussein’s rule.

kurds opposed saddam rule and wanted independence. kurds in the north and shiites in the south revolt against hussein.

for example, the halabja attack in 1988 conducted against the kurdish people by the iraqi regime under saddam hussein, where between 4000 people are killed and around 9000 are injured.