Silicon is obtained by heating silicon oxide (4) with magnesium. How much magnesium

Silicon is obtained by heating silicon oxide (4) with magnesium. How much magnesium is required to obtain 700 g of silicon?

Let’s implement the solution:
1. We compose the equation of the process:
SiO2 + 2Mg = Si + 2MgO – substitutions, silicon was obtained;
2. We make calculations:
M (Mg) = 24.3 mol.
M (Si) = 28 g / mol.
3. Determine Y (amount) of non-metal Si:
Y (Si) = m / M = 700/28 = 25 mol.
4. Proportion:
X mol (Mg) – 25 mol (Si);
-2 mol – 1 mol from here, X mol (Mg) = 2 * 25/1 = 50 mol.
5. Find the mass of the metal Mg:
m (Mg) = Y * M = 50 * 24.3 = 1215 g. = 1 kg 215 g.
Answer: to carry out the process, magnesium with a mass of 1 kg is required. 215 BC