### PowerPoint - MCHS Science

```Starter:
Study Guide: Vocabulary words 1-6
September 20, 2011
The Mole Song (2nd try)
2TI
Chalk Talk
• What is the mass in grams of 2.25 mol of the
element iron, Fe?
2.25 mol Fe x (55.9g Fe/1 mol Fe)=126g Fe
Chalk Talk
• What is the mass in grams of .375 mole of the
element potassium, K?
.375 mol K x (39.1g K/1 mol)= 14.7 g K
Chalk Talk
• What is the mass in grams of .0135 moles of
the element sodium, Na?
.0135 mol Na x (23 g Na/1 mol)=.310 g Na
Chalk Talk
• What is the mass in grams of 16.3 mole of the
element nickel, Ni?
16.3 mol Ni x (58.7g Ni/1 mol Ni)=957g Ni
Chalk Talk
• A chemist produced 11.9 grams aluminum,
Al. How many moles of aluminum were
produced?
11.9g Al x (1 mol Al/ 27 g Al)=.441 mol Al
Chalk Talk
• How many moles of gold, Au, are in
3.60 x 10-10 grams gold?
3.6 x 10-10 grams Au x (1 mol/197 g Au)=1.83 x 10-12 mol Au
Chalk Talk
• What is the mass in grams of 7.5 x 1015 atoms
of Nickel, Ni?
7.5 X 1015 atoms x (1 mol Ni/ 6.02x 1023atoms) x (58.7g Ni/1 mol)=7.3x10-7 g Ni
Chalk Talk
• How many atoms of sulfur, S, are in 4.00g of
sulfur?
4.00g S x (1 mol S/ 32.1g S) x (6.02 x 1023 atoms S/1 mol S) = 7.50 x 1022 atoms S
Chalk Talk
• What mass of gold, Au, contains the same
number of atoms as 9.0g of aluminum, Al?
9.0g Al x (1 mol Al/27.0g Al) x (6.02 x 1023 atoms/1 mol Al)= 2.01 x 1023 atoms Al
2.01 x 1023 atoms Au x (1 mol Au/6.02 x 1023 atoms) x (197 g Au/1 mol Au)= 65.7 grams
Au
Homework
• Due: TOMORROW
• Pg. 85 # 5-7; pg. 87 # 17, 18, 22, 23
•
•
•
•
DUE: FRIDAY
Atomic Structure Worksheet (take home quiz)
ONLY SECTIONS 1-2
You may work with a partner on this quiz….BUT
DO NOT CHEAT!
```