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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

Respuesta :

organicstars801

Answer:

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

Answer:

242 grams of HF

Explanation:

This is correct! :)

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