Calculate the mass of tungsten that can be obtained by reduction with hydrogen at high temperature

Calculate the mass of tungsten that can be obtained by reduction with hydrogen at high temperature tungsten oxide weighing 34.8 g.

To solve, we write the equation:
WO3 + 3H2 = W + 3H2O – OVR, tungsten obtained;
We calculate the molar masses of substances:
M (WO3) = 231.8 g / mol;
M (W) = 183.8 g / mol.
We find the number of moles of tungsten by the formula:
Y (W) = m / M = 34.8 / 231.8 = 0.15 mol.
We compose the proportion using these equations:
0.15 mol (WO3) – X mol (W);
-1 mol -1 mol, so Y (W) = 0.15 mol.
Determine the mass W:
m (W) = Y * M = 0.15 * 183.8 = 27.57 g.
Answer: during the reaction, tungsten with a mass of 27.57 g is released.