Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chem3 Ch5.p1

Chemical Composition: Conversions

Avogadro's Number 1 mole = 6.022 x10 to the 23 atoms
1 mole Si =6.022 x 10 to the 23 Si atoms/1 mole Si
Molar Mass of SiO2 (g/mol) = 28.09 g/1 molle Si + (2 x 16g/1 mole O2)=60.09g SiO2/mole SiO2
Molar Mass of CaCl2 (g/mol) = 40.078 g/1 mole Ca + (2 x 35.453 g/1 mole Cl)= 110.984 g/1 mole CaCl2
Average atomic mass of Ne =Average atomic mass of Ne isotopes ((20)Ne + (21)Ne + (22)Ne) = (19.99 amu + 20.99 amu + 21.99 amu)/3 = 20.18 amu
Grams to Moles No. of mole atom (mol) = mass (g)/molar mass (g/mol)
No. mol of Si = 30.5 g of Si X 1 mole Si/28.09 g Si = 1.09 mol Si
Moles to Atoms No. of atoms = No. of mole of atom (mol) X 6.022 x 10 to the 23 atoms/mol
No. of atoms Si = 1.09 mole Si X 6.022 x 10 to the 23 atoms Si/ mol Si = 6.56 x 10 to the 23 atomsSi
Atoms to Grams Mass (g) = No. of atoms X molar mass (g/mol)/6.022 x 10 to the 23 (atoms/mol)
Grams to Molecules No. molecules = mass (g) of sample /molar mass (g/mol) X 6.022 x 10 to the 23 molecules/mol
No. of CaCl2 molecules = 49.3 g Cacl2 X 1mol CaCl2 /110.984 g X 6.022 x 10 to the 23 atoms CaCl2/1 mol CaCl2 = 2.67 x 10 to the 23 molecules
Created by: nikkimem32