BMS1050 chem

How many electrons can the p subshell hold in total?

• 2

• 4

• 6

• 10

Which is NOT a way to express 200 mM

• 0.2 M

• 0.2 M l^-1

• 200 mmol/l

What type of bonding holds the atoms in a molecule of ammonia (NH₃) together?

• Hydrogen

• Ionic

• van der Waals

• Covalent

HCl is a polar molecule. Why is this?

• Cl is more electronegative than H

• Cl^- is negative, H⁺ is positive

• Cl has more protons than H

• Cl atoms are bigger than H

A reaction has a ΔH of -140 kJ mol^-1. Is it:

• Exothermic

• Endothermic

• Exergonic

• Endergonic

Which property is NOT an important factor in determining whether a reaction is feasible?

• Entropy change

• Temperature

• Rate

• Energy change