Question

Question #bce2a

Answer 1

You could recover 3.76 mg of Cd²⁺.

You must first convert tons of wastewater to grams and then to milligrams.

Remember that “3.70 ppb” means “3.70 mg/10⁹ mg”.

1016 kg wastewater × `(1000 g wastewater)/(1 kg wastewater)` =
1.016 × 10⁶ g wastewater

1.016 × 10⁶ g wastewater × `(1000 mg wastewater)/(1 g wastewater)`=
1.016 ×10⁹ mg

1.016 ×10⁹ mg wastewater × `(3.70 mg Cd²⁺)/(10⁹ mg wastewater)` = 3.76 mg Cd²⁺