IMSU Chemistry 2019/2020 Model Past Questions

Practice each question, then open it to see the full details.

The electronic configuration of Mg²⁺ is

A.1S²2S²2P⁶
B.1S²2S²2P⁶3S²
C.1S²2S²2P⁶3S¹
D.1S²2S²2P⁴

How many moles of KBrO₃ are required to prepare 0.0700 moles of Br₂ according to the reaction below
KBrO₃ + 5KBr + 6HNO₃ ⟶ 6KNO₃ + 3Br₂ +3H₂O

A.0.210
B.0.0704
C.0.220
D.0.0233

The formula weight of the compound, CaSO₄ is:

A.394.4g
B.140.0g
C.136.0g
D.466.8g

How many moles of alanine, C₃H₇NO₂, are there in 159g of alanine?

A.1.42 x 10⁴
B.1.78
C.0.992
D.0.560

Which of the following does not have a noble gas electron configuration?

A.S^2-
B.Ba²⁺
C.Na⁺
D.O^3-