Consider the unbalanced chemical equation below: CaSiO3(s) + HF(g) - CaF2(aq) + SiF4(q) + H20(1)
Suppose a 31.5 g sample of CaSiO3 reacted with 31.5 L of HF at 27.0 °C and 1.00 atm. Assuming the reaction goes to completion, calculate the mass (in grams)
of the SiF4 and H2O produced in the reaction.

i'm pretty sure its b i might be wrong though!

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

answer7,570,82356 cubic centimeters;