PHS ScienceDroid

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School ID

Problem 1

What is the mass of moles of sodium?.

Your Answer g

Problem 2

How many moles of zinc are the in g of zinc?

Your Answer mol

Problem 3

A student has moles of potassium. How many individual atoms of potassium is this?

Your Answer atoms

Problem 4

Problem 5

How many atoms are in g of lead?

Your Answer atoms

Silicone has three naturally occuring isotopes. Calculate the average atomic mass of silicone from the data below:

Mass Number          Atomic Mass          Percent Abundance
28                             27.976927              92.233
29                             28.976495
30                             29.973770

Your Answer amu's