Question

Question 4: Identify a Substance (8 points)
Tungsten(VI) oxide can be reduced to tungsten by heating it with carbon, as shown in the reaction:
2WO3(s) + 3C(s) ↔ 2W(s) + 3CO2(g)
If the original mass of WO3 is 37.0 g, how many grams of CO2 must be collected from the reaction in order to infer that the solid that remains is pure tungsten? (Round to the nearest whole number.)

Answer 1

@Abmon98 Please help!

Answer 2

@Abmon98

Answer 3

Find the Number of moles of WO3, by using the mass of WO3(37g) and the relative molecular mass. Number of moles(mol)=Mass(g)/Molar mass(g/mol).

Answer 4

Ok so what does it look like?

Answer 5

It's 8 moles right?

Answer 6

Use your periodic table to calculate the Mr of WO3.

Answer 7

Ok thanks :)

Answer 8

After you have calculated the number of moles of WO3 use mole ratio according to your balanced chemical equation between WO3 and mole ratio. then use Number of moles(mol)=Mass(g)/Molar mass(g/mol) to calculate the mass of CO2