If a sample of pure cadmium has a mass of 18.2 grams, how many moles of cadmium are in the sample?

6.17 mol

112.4 mol

0.16 mol

2045.7 mol

Answer;

= 0.16 moles

Explanation;

1 mole of an element contains mass equivalent to its atomic mass.

The molecular mass of Cadmium is 112.411 g

Moles = mass in grams / molecular weight  

Thus, the moles in 18.2 grams will be;

Moles = 18.2 / 112.411  

= 0.161 moles

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >