Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

Wat doet een katalysator?

1. AHij levert de beginstoffen voor een reactie
2. BHij verandert de producten van een reactie
3. CHij vertraagt een reactie en wordt verbruikt
4. DHij versnelt een reactie zonder zelf verbruikt te worden

Which property is typical of nonmetals?

1. AThey are all solids at room temperature
2. BThey are shiny and easily bent into wires
3. CThey easily lose electrons to form positive ions
4. DThey are poor conductors of heat and electricity

What is an empirical formula?

1. AA drawing of how the atoms are bonded
2. BThe simplest whole-number ratio of atoms in a compound
3. CThe actual number of each atom in one molecule
4. DThe mass of one mole of a compound

In the ideal gas law, PV = nRT, what does n stand for?

1. AThe number of molecules of gas
2. BThe number of atoms per molecule
3. CThe number of moles of gas
4. DThe density of the gas

How can you get solid salt back from salt water?

1. AFilter the solution
2. BFreeze the solution and lift out the salt
3. CUse a magnet
4. DEvaporate the water

In a reaction at equilibrium, a product is continuously removed. What happens?

1. AThe equilibrium shifts to the left to form more reactants
2. BThe reaction rate drops to zero
3. CThe reactants run out immediately
4. DMore product keeps forming as the equilibrium shifts to the right

Alkanes follow the general formula CₙH₂ₙ₊₂. What is the formula of the alkane with 4 carbon atoms?

1. AC₄H₆
2. BC₄H₈
3. CC₄H₁₀
4. DC₄H₁₂

Which statement correctly distinguishes a scientific law from a scientific theory?

1. AA law describes what happens; a theory explains why it happens
2. BLaws apply only to chemistry, theories only to biology
3. CA theory becomes a law once it is proved
4. DA law is only a guess, while a theory is a proven fact