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HOLD UP YOUR BOARD! Chapter 7 Review game. Free powerpoint template: www.brainybetty.com 2 Rules Use the same periodic table. Use the mass as written.

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Presentation on theme: "HOLD UP YOUR BOARD! Chapter 7 Review game. Free powerpoint template: www.brainybetty.com 2 Rules Use the same periodic table. Use the mass as written."— Presentation transcript:

1 HOLD UP YOUR BOARD! Chapter 7 Review game

2 Free powerpoint template: 2 Rules Use the same periodic table. Use the mass as written on the periodic table Round up your calculations to 2 decimal points Follow significant rule for your final answer Do the calculation on the board and circle your answer All your units must be included for full credit! If you get a questions wrong, you are out until you get the COME BACK questions correct.

3 Free powerpoint template: 3 Rules Everyone will need to show their own work on a separate sheet of paper for a 1 HW credit. The winning team will receive 5pt extra credit on the test.

4 Free powerpoint template: 4 Question #1 Find the number of molecules or ions 2.00 mol Fe 3+

5 Free powerpoint template: mol 1 mol 6.02 x ions = 1.20 x ions

6 Free powerpoint template: 6 Question #2 Find the number of moles x molecules of H 2 O

7 Free powerpoint template: 7 1 mol 3.01 x molecules = mol H 2 O 6.02 x molecules

8 Free powerpoint template: 8 Question #3 Find the number of moles of sodium ions Na+ Na 2 CO 3

9 Free powerpoint template: 9 2 mol of Na+

10 Free powerpoint template: 10 Question #4 Find the number of sodium ions 3.00 mol Na 2 CO 3

11 Free powerpoint template: mol Na2CO3 1 mol Na2CO x ions2 mol Na+ 1 mol Na+ = 3.61 x atoms

12 Free powerpoint template: 12 Question #5 Find the mass in grams 4.30 x atoms of H e

13 Free powerpoint template: mol 4.30 x atoms = 2.86 x g He 6.02 x molecules 1 mol 4.00 g

14 Free powerpoint template: 14 COME BACK!!!!! Find the mass in grams 4.01 x atoms of Ca

15 Free powerpoint template: mol 4.01 x atoms = 26.7 g Ca 6.02 x molecules 1 mol g

16 Free powerpoint template: 16 Question #6 What is the percent composition of Na in NaCl?

17 Free powerpoint template: 17 NaCl = g Na 22.99g Na g Cl = g NaCl g Na x 100 % g NaCl = 39.34% Na

18 Free powerpoint template: 18 Question #7 Determine the empirical formula of a compound that is 63.50% Ag, 8.25% N 28.25% O.

19 Free powerpoint template: g Ag = 0.59 mol Ag 8.25 g N = 0.59 mol N g O = 1.77 mol O Divide all the mol by AgNO 3

20 Free powerpoint template: 20 Question #8 Determine the empirical formula of a compound that is 56.34% P And the rest is O.

21 Free powerpoint template: g P = 1.82 mol P g O = 2.73 mol O Divide all the mol by PO 1.5 Multiply by 2 for whole number ratio P2O3P2O3

22 Free powerpoint template: 22 Question #9 A compound has an empirical formula of CH. Its molecular mass is 78 g/mol. What is its molecular formula?

23 Free powerpoint template: 23 C = g/mol H = 1.01 g/mol g/mol 78 g/mol g/mol = 5.99 = 6 6 ( CH) = C 6 H 6

24 Free powerpoint template: 24 Question #10 The empirical formula is P 2 O 5. Its molar mass is 284 g/mol. Determine the MOLECULAR formula.

25 Free powerpoint template: 25 P x 2 = g/mol x 2 O x 5 = g/mol x g/mol 284 g/mol g/mol = 2 2 ( P 2 O 5 ) = P 4 O 10


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