Question

HELPPP ASAP

15)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. The reaction requires grams of HF.

Answer 1

Round to whatever place you need.

I hope this helps.

Answer 2

The reaction requires 243 grams of HF.

Step-by-step explanation:

`SiO_2 + 4HF\rightarrow SiF_4 + 2H_2O`

Moles of silicon dioxide =
`(182 g)/(60 g/mol)=3.033 mol`

According to reaction 1 moles of silicon dioxide reacts with 4 moles of hydrogen fluoride.

Then 3.033 moles of silicon dioxide will react with:

`(4)/(1)* 3.033 mol=12.133 mol` of hydrogen fluoride

Mass of 12.133 moles of hydrogen fkluorode is:

`12.133 mol* 20 g/mol=242.66 g\approx 243 g`

The reaction requires 243 grams of HF.