Given:

SiO2 + 4HF → SiF4 + 2H2O

In this chemical reaction, how many grams of HF are needed for 182 grams of SiO2 to react completely? Express your answer to three significant figures

242 gram of HF will be required for complete rex.

Balance chemical equation:

SiO2 + 4HF → SiF4 + 2H2O

Data given

mass of SiO2 = 182g

molar mass of SiO2=60.08

moles of SiO2 = mass/molar mass = 182/60.08 = 3.02 moles

From balance chemcial equation

SiO2 : HF

1 : 4

3.02 = 4 * 3.02 = 12

mass of HF = no. of moles * molar mass

mass of HF = 12.08*20 = 242 g