Tungsten can be extracted from tungsten oxide, $WO3\text{WO}_3$ , by reaction with hydrogen.

120 tonnes of tungsten oxide was heated with hydrogen. The tungsten formed in the reaction was separated and purified. The mass of tungsten was then determined.

The results are shown in Table 1.

Table 1

	Mass in tonnes
Mass of tungsten oxide	120.00
Mass of tungsten produced	61.30
Theoretical mass of tungsten formed	84.50

Use the information in Table 1 to calculate the percentage yield of tungsten in this process.

\text{percentage yield} = \frac{\text{actual yield}}{\text{theoretical yield}} \times 100

Give your answer to 1 decimal place.

Tungsten can be extracted from tungsten oxide, $WO3\text{WO}_3$ , by reaction with hydrogen.

120 tonnes of tungsten oxide was heated with hydrogen. The tungsten formed in the reaction was separated and purified. The mass of tungsten was then determined.

The results are shown in Table 1.

Table 1

	Mass in tonnes
Mass of tungsten oxide	120.00
Mass of tungsten produced	61.30
Theoretical mass of tungsten formed	84.50

Use the information in Table 1 to calculate the percentage yield of tungsten in this process.

\text{percentage yield} = \frac{\text{actual yield}}{\text{theoretical yield}} \times 100

Give your answer to 1 decimal place.

Calculations involving masses

Question 20

Table 1

Markscheme

Calculations involving masses

Question 20

Table 1

Markscheme

Calculations involving masses

Question 20

Table 1

Calculations involving masses Questions

Calculations involving masses

Question 20

Table 1

Calculations involving masses Questions