Question

31

Multiple Choice
2.5 points



Question at position 31

Compared with ionic compounds, molecular compounds


have higher boiling points


are brittle


have lower melting points


are harder

Question at position 32
32

Multiple Choice
2.5 points



Question at position 32

Changing a subscript in a correctly written chemical formula


changes the number of moles represented by the formula.


changes the charges on the other ions in the compound.


changes the formula so that it no longer represents that compound.


has no effect on the formula.

Question at position 33
33

Multiple Choice
2.5 points



Question at position 33

What is the formula for aluminum sulfate?


AlSO4


Al2SO4


Al2(SO4)3


Al(SO4)3

Question at position 34
34

Multiple Choice
2.5 points



Question at position 34

Name the compound KClO3


potassium chloride


potassium trioxychlorite


potassium chlorate


hypochlorite

Question at position 35
35

Multiple Choice
2.5 points



Question at position 35

Name the compound CuCO3.


copper(I) carbonate


cupric trioxycarbide


copper(II) carbonate


cuperous carbide

Question at position 36
36

Multiple Choice
2.5 points



Question at position 36

What is the formula mass of ethyl alcohol, C2H5OH?


30.328 amu


33.271 amu


46.069 amu


40.059 amu

Question at position 37
37

Multiple Choice
2.5 points



Question at position 37

What is the formula mass of (NH4)2SO4?


102.02 amu


114.62


132.13 amu


142.92

Question at position 38
38

Multiple Choice
2.5 points



Question at position 38

The molar mass of an element is the mass of one


atom of the element


mole of the element


gram of the element


liter of the element

Question at position 39
39

Multiple Choice
2.5 points



Question at position 39

The molar mass of H2O is 18.015 g/mol. How many grams of H2O are present in 0.20 mol?


.2 g


3.6 g


35.9 g


89.9 g

Question at position 40
40

Multiple Choice
2.5 points



Question at position 40

The molar mass of CCl4 is 153.81 g/mol. How many grams of CCl4 are present in 5.000 mol?


5 g


30.76 g


769.05 g


796.0 g

Answer 1

31 — have lower melting points

32 — changes the formula so that it no longer represents that compound.

33 — Al2(SO4)3

34 — potassium chlorate

35 — copper(II) carbonate

36 — 46.069 amu

37 — 132.13 amu

38 — mole of the element

39 — 3.6 g

40 — 769.05 g