NO LINKS PLS IM GENUINELY CONFUSED The action level for copper is 1.3 mg/L. If a 50 mL sample from a water source contained .0000045 grams of copper, how many ppm would it contain?

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

the objects have the same charge.