Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

What are the usual units of molar mass?

1. Amol/L
2. Bg/L
3. Cg/mol
4. Dmol/g

Wat is de chemische formule van water?

1. AOH
2. BHO₂
3. CH₂O₂
4. DH₂O

In a chemical equation, what are the reactants?

1. AThe catalysts written above the arrow
2. BThe new substances formed, written to the right of the arrow
3. CThe numbers written in front of each formula
4. DThe starting substances, written to the left of the arrow

Wat gebeurt er met de druk van een gas dat wordt verhit in een stijve, afgesloten houder?

1. ADie neemt toe
2. BDie daalt tot nul
3. CDie blijft gelijk
4. DDie neemt af

Why does water boil at a lower temperature at the top of a high mountain?

1. AThe air pressure is lower, so less vapour pressure is needed to boil
2. BGravity is weaker, so the molecules escape more easily
3. CThere is less oxygen dissolved in the water up there
4. DThe air is colder, so the water loses heat and boils sooner

Which halogen is the most reactive?

1. AChlorine
2. BBromine
3. CFluorine
4. DIodine

A reaction at equilibrium has a very large equilibrium constant (K much greater than 1). What does this tell you?

1. AAt equilibrium, the mixture contains mostly reactants
2. BAt equilibrium, the mixture contains mostly products
3. CThe reaction is very fast
4. DThe reaction cannot reach equilibrium

Pepsin digests protein in the stomach at about pH 2, but it stops working once food moves into the small intestine, where the pH is higher. Why?

1. APepsin only works on fats in the small intestine
2. BThe small intestine is too cold for any enzyme
3. CThe change in pH alters the shape of pepsin's active site
4. DPepsin is used up completely in the stomach, just like a reactant