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Mashutka [201]
3 years ago
10

Given:

Chemistry
1 answer:
Jlenok [28]3 years ago
8 0

<em>Answer:</em>

<em>242 gram</em> of HF will be required for complete rex.

<em>Balance chemical equation:</em>

                                SiO2 + 4HF → SiF4 + 2H2O

<em>Data given</em>

                                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 =<em> 242 g</em>

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