Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

Easy

An industrial plant uses silicon dioxide to produce silicon tetrachloride.

What is the relative formula mass ( $M_r$ ) of silicon dioxide, $SiO2\text{SiO}_2$ ?

Relative atomic masses ( $A_r$ ): $Si=28\text{Si} = 28$ $O=16\text{O} = 16$

The plant calculates that a reaction starting with 300 g of silicon dioxide should theoretically produce 1.5 kg of silicon tetrachloride.

However, the actual mass of silicon tetrachloride obtained is 1050 g.

Calculate the percentage yield of silicon tetrachloride.

$44$

$60$

$76$

$92$

Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations Questions