182 grams
Asked by maham237 @ in Chemistry viewed by 129 People
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
Answered by maham237 @
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
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