How do molecular chemical formulas differ from ionic chemical formulas?
3. Open Ended
30 seconds
1 pt
Write formulas for the compounds formed between the following:
a. Aluminium and Bromine
b. Sodium and Oxygen
c. Magnesium and Iodine
d. Pb2+ and O2-
e. Sn2+ and I-
f. Fe3+ and S2-
g. Cu2+ and NO-₃
h. NH+₄ and SO2₄-
4. Open Ended
30 seconds
1 pt
Name the following compounds by using the Stock system:
a. NaI
b. MgS
c. CaO
d. K₂S
e. CuBr
f. FeCl₂
5. Open Ended
30 seconds
1 pt
Write a formula for the following compound:
a. Sodium hydroxide
b. Lead(II) nitrate
c. Iron(II) sulfate
d. Diphosphorus trioxide
e. Carbon diselenide
6. Open Ended
30 seconds
1 pt
Draw the Lewis structure, give the name, and predict the VSEPR geometry of SCl₂
7. Open Ended
30 seconds
1 pt
What are monatomic ions?
8. Open Ended
30 seconds
1 pt
Give three examples of monatomic ions?
9. Open Ended
30 seconds
1 pt
How does the chemical formula for the nitrite ion differ from the chemical formula for the the nitrate ion?
10. Open Ended
30 seconds
1 pt
Using only the periodic table, write the symbol of the ion most typically formed by each of the following elements:
a. K
b. Ca
c. S
d. Cl
e. Ba
f. Br
11. Open Ended
30 seconds
1 pt
Write the formula for and indicate the charge on each of the following ions:
a. Sodium ion
b. Aluminium ion
c. Chloride ion
d. Nitride ion
e. Iron (II) ion
f. Iron (III) ion
12. Open Ended
30 seconds
1 pt
Name each of the following monatomic ions:
a. K+
b. Mg2+
c. Al3+
d. Cl-
e. O2-
f. Ca2+
13. Open Ended
30 seconds
1 pt
Write formulas for the binary ionic compounds formed between the following elements.
a. sodium and iodine
b. calcium and sulfur
c. zinc and chlorine
d. barium and fluorine
e. lithium and oxygen
14. Open Ended
30 seconds
1 pt
Give the name of each of the following binary ionic compound:
a. KCI
b. CaBr₂
c. Li₂O
d. MgCl₂
15. Open Ended
30 seconds
1 pt
Write the correct formula and give the names of the compounds formed by the following ions:
a. Cr2+ and F1-
b. Ni2+ and O2-
c. Fe3+ and O2-
16. Open Ended
30 seconds
1 pt
What determines the order in which the component elements of binary molecular compounds are written?
17. Open Ended
30 seconds
1 pt
Write formulas for each of the following binary molecular compounds?
a. Carbon tetrabromide
b. Sulfur dioxide
c. Phosphorus pentabromide
d. Iodine trichloride
e. Nitrogen triiodide
f. Dinitrogen trioxide
18. Open Ended
30 seconds
1 pt
Distinguish between binary acids and oxyacids, and give two examples of each.
19. Open Ended
30 seconds
1 pt
What is a salt?
20. Open Ended
30 seconds
1 pt
Give two examples of salts.
21. Open Ended
30 seconds
1 pt
Name each of the following acids:
a. HF
b. HBr
c. HNO₃
d. H₂SO₄
e. H₃PO₄
22. Open Ended
30 seconds
1 pt
Give the molecular formulas for each of the following acids:
a. Sulfurous acid
b. Chloric acid
c. Hydrochloric acid
d. Hypochlorous acid
e. Perchloric acid
f. Carbonic acid
g. Acetic acid
23. Open Ended
30 seconds
1 pt
Assign oxidation numbers to each atom in the following compounds or ions:
a. HF
b. CI₄
c. H₂O
d. PI₃
e. CS₂
f. Na₂O₂
g. H₂CO₃
h. NO-₂
i. SO2-₄
24. Open Ended
30 seconds
1 pt
Name the following binary molecular compound according to the stock system:
a. CI₄
b. SO₃
c. As₂S₃
d. NCl₃
25. Open Ended
30 seconds
1 pt
Determine the oxidation numbers for iron oxide, Fe₃O₄, (recall that oxidation numbers are integers).
26. Open Ended
30 seconds
1 pt
Name each of the following ions according to the Stock system:
a. Fe2+
b. Fe3+
c. Pb2+
d. Pb2+
e. Pb4+
f. Sn2+
g. Sn4+
27. Open Ended
30 seconds
1 pt
Name the following binary molecular compounds by using the Stock system:
a. Carbon tetrabromide
b. Sulfur dioxide
c. Phosphorus pentabromide
d. Iodine trichloride
e. Nitrogen triiodide
f. Dinitrogen trioxide
28. Open Ended
30 seconds
1 pt
Write formulas for each of the following compounds:
a. Phosphorus (III) iodide
b. Sulfur (II) chloride
c. Carbon (IV) sulfide
d. Nitrogen (V) oxide
29. Open Ended
30 seconds
1 pt
What are oxidation numbers?
30. Open Ended
30 seconds
1 pt
What useful functions do oxidation numbers serve?
31. Open Ended
30 seconds
1 pt
What are the rules of assigning oxidation numbers?
32. Open Ended
30 seconds
1 pt
What is the difference between molar mass and formula mass?
33. Open Ended
30 seconds
1 pt
How are molar mass and molecular mass different?
34. Open Ended
30 seconds
1 pt
What is the significance of molar mass?
35. Open Ended
30 seconds
1 pt
Determine both formula mass and molar mass of ammonium carbonate (NH₄)₂CO₃.
36. Open Ended
30 seconds
1 pt
How many moles of atoms of each element are there in one mole of (NH₄)₂CO₃?
37. Open Ended
30 seconds
1 pt
What is the mass in grams of 3.25 mol Fe₂(SO₄)₃?
38. Open Ended
30 seconds
1 pt
What is meant by the Percentage composition of Compounds?
39. Open Ended
30 seconds
1 pt
How many molecule of aspirin, C₉H₈O₄, are there in a 100.0 mg tablet of aspirin?
40. Open Ended
30 seconds
1 pt
Calculate the percentage composition of (NH₄)₂CO₃.
41. Open Ended
30 seconds
1 pt
A sample of hydrated copper (II) sulfate (CuSO₄ x ___H₂O) is heated to 150 degree C and produces 103.74g anhydrous copper (II) sulfate and 58.55g water. How many moles of water molecules are present in 1.0 mol of hydrated copper(II) sulfate?
42. Open Ended
30 seconds
1 pt
In what unit is formula mass expressed?
43. Open Ended
30 seconds
1 pt
Determine the formula mass of each of the following compounds or ions:
a. Glucose, C₆H₁₂O₆
b. Calcium acetate, Ca(CH₃COO)₂
c. Ammonium ion, NH+₄
d. Chlorate ion, ClO-₃
44. Open Ended
30 seconds
1 pt
Determine the number of moles of each type of monatomic or polyatomic ion in one mole of the following compounds. For each polyatomic ion, determine the number of moles of each atom present in one mole of the ion.
a. KNO₃
b. Na₂SO₄
c. Ca(OH)₂
d. (NH₄)₂SO₄
45. Open Ended
30 seconds
1 pt
See more practice problems on page 253 #30-33
46. Open Ended
30 seconds
1 pt
What three types of information are used to find empirical formula from percentage composition data?
47. Open Ended
30 seconds
1 pt
What are the steps to finding the empirical formula of a compound when you are given percent composition?
48. Open Ended
30 seconds
1 pt
A compound contains 36.48% Na, 25.41% S and 38.11% O. What is this compound's empirical formula?
49. Open Ended
30 seconds
1 pt
What are the steps to finding the empirical formula of a compound when you are given the sample mass and the mass of one of two elements within the compound?
50. Open Ended
30 seconds
1 pt
Find the empirical formula of a compound with a sample mass of 10.150 g, which is known to contain only phosphorus and oxygen and has a phosphorus content of 4.433 g.
51. Open Ended
30 seconds
1 pt
How does a empirical formula differ from a molecular formula?
52. Open Ended
30 seconds
1 pt
What equation represents the relationship between the empirical formula and the molecular formula of a compound?
53. Open Ended
30 seconds
1 pt
What equation represents the relationship between empirical formula mass and molecular formula mass?
54. Open Ended
30 seconds
1 pt
How do you find the molecular formula from the empirical formula of a compound?
55. Open Ended
30 seconds
1 pt
What is the molecular formula of a compound of phosphorus and oxygen whose empirical formula is P₂O₅ with a molar mass of 283.89 g/mol?