Chemistry 186 Practice Final

In what cases are prefixes like di and tri used in naming compounds

• Ionic compounds

• covalent compounds

• Both ionic and covalent compounds

• They are never use in naming compounds

What isotope of iron seems most prevalent considering the average atomic mass given?

• Iron-55

• Iron-56

• Iron-55.85

• Iron-54

What would the following number be in scientific form?

• 1.358 x 10⁴

• 1.358 x 10³

• 1.358 x 10^-3

• 1.358 x 10^-4

How many significant figures does the following number have: 0.002040

• 4

• 3

• 2

• 1

What is the formula for strontium sulfate?

• Sr₂S₃

• Sr₃(SO₄)₂

• SrSO₄

• SrS

A common charge for non-metals in group VIA (6A) is....

• +1

• +6

• -2

• -1

• +3

What is the molar mass of carbon tetrabromide (CBr₄)?

• 331.63

• 91.904

• 12.0

• 319.82

Balance the following equation: (Phosphorus is not a diatomic gas)

__ Rb + __ P → __Rb₃P

• 3, 1, 1

• 1, 3, 1

• 1, 1, 3

• 6, 2, 2

Balance the following reaction:

__ Fe + __ O₂ → __ Fe₂O₃

• 2, 3, 4

• 3, 2, 4

• 4, 2, 3

• 4, 3, 2

Tags

NGSS.HS-PS1-7

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂

How many grams of aluminum sulfate would be formed if 62.5g H₂SO₄ completely reacted with aluminum? (The molar mass of aluminum sulfate is 342.15)

• 72.7 g

• 290 g

• 450 g

• 218 g