HCI Science Chem + Phys Chap 3 - 7

Front

Be²⁺ and P³⁻

Back

Be₃P₂

Front

Al³⁺ and F⁻

Back

AlF₃

Front

Th⁴⁺ and N³⁻

Back

Th₃N₄

Front

Bi⁵⁺ and O²⁻

Back

Bi₂O₅

Front

Which pair of compounds shows that manganese exists in different oxidation states?

A) MnO and KMnO₄
B) MnF₂ and MnBr₂
C) Mn₂O₃ and MnCl₃
D) Mn(NO₃)₂ and MnSO₄

Back

A) MnO and KMnO₄

Front

Which pair of compounds best shows that cobalt can have different ionic charges?

A) CoCl₂ and CoCl₃
B) CoSO₄ and Co(NO₃)₂
C) Co₂O₃ and Co(OH)₃
D) CoO and CoS

Back

A) CoCl₂ and CoCl₃

Front

Which of the following compounds contains both ionic and covalent bonds?

A) NO₂Cl
B) C₂H₅OH
C) K₂SO₄
D) BCl₃

Back

C) K₂SO₄

Front

How many valence electrons are not involved in bonding in the molecule PCl₃F₂ (phosphorus pentachloride with 3 Cl and 2 F atoms)?

A) 16
B) 22
C) 28
D) 30

Back

D) 30

Front

Pentanol (C₅H₁₂O) combusts completely in oxygen:

What is the value of x + y + z when the equation is balanced using the lowest whole-number coefficients?

A) 36
B) 37
C) 38
D) 39

Back

Front

Which reaction best demonstrates the amphoteric nature of zinc oxide (ZnO)?

A) ZnO + H₂SO₄ → ZnSO₄ + H₂O
B) ZnO + NaOH → Na₂ZnO₂ + H₂O
C) ZnO + CO₂ → ZnCO₃
D) ZnO + Cl₂ → ZnCl₂O

Back

B) ZnO + NaOH → Na₂ZnO₂ + H₂O