CHEM 121 WW1 KK/ CHEM121 HOL - lab report Mass Conversions to Moles and Atoms | Answered Updated Summer 25/26.

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 Summer 2025 CHEM 121 WW1 KK

Mass Conversions to Moles and Atoms

EXPLORATION  EXPERIMENTATION  EVALUATION 


Final Report

Student Name Serafeim Skouras Institution City Colleges of Course Summer 2025 CHEM
Student ID 290780 Chicago - Online 121 WW1 KK

Lesson Mass Conversions to Session 1261_11612 Instructor Sangita Deb
Moles and Atoms




Closely review your work. You will NOT be able to change your answers in the
 experimentation section once you click “Submit Your Data” below.

This Final Report page displays the answers and data you recorded throughout the
lesson. Review the entire page to ensure your work is accurate and nothing is
missing. To finalize the report, click “Submit Your Data” below. Turn in the Final
Report using your instructor’s preferred method.



Test Your Knowledge

Question 1




Skip to main content
(https://myhol.holscience.com/instances/46875#/experimentation/619943/final#ma
lesson-content)

, Match each term with the best description.



Unit of measure that contains
as many atoms, molecules, or
1 Mole 
formula units as there are in 12
grams of pure carbon-12


Average mass of the various
isotopes of an element, 2 Atomic mass 
expressed in amu


The amount of atoms in one
3 Avogadro's number 
mole of 12C or 6.022 x 1023


Mass of a substance that
contains one mole of that 4 Molar mass 
substance




Question 2




Need Help?
Order the steps for calculating the atoms of an element present in a compound.



Calculate the moles from the
conversion of the molar mass 1 2 
and grams of the sample


Convert moles to atoms using
2 4 
Avogadro's number


Calculate the molar mass of
3 1 
the compound


Calculate the moles of each
element present in the 4 3 
compound.