Acopper sample in the form of a prism has the following dimensions: length, 1.25 m; width, 1.25 m; height, 2.15 m. if the density of copper is reported as 8.9 g/cm3, calculate, using dimensional analysis, the mass of the sample in kilograms.

= 29,898.4375 Kg

Volume of a prism is given by the formula;

V = base area × height

   = 1.25 m × 1.25 m × 2.15 m

   = 3.359375 m³

Density = 8.9 g/cm³

This is equivalent to ; 8900 kg/m³

Therefore;

Mass = Density × volume

         = 8900 kg/m³ × 3.359375 m³

         = 29,898.4375 Kg

the equation for synthesis of water is as follows;

here two moles of hydrogen are used with one mole of oxygen which gives one molecule of water as a product. but shana misinterpreted 2 moles as 2 grams in this equation.