Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

Welke subatomaire deeltjes zitten in de kern?

1. AAlleen elektronen
2. BElektronen en neutronen
3. CProtonen en elektronen
4. DProtonen en neutronen

What is the formula of sulfuric acid?

1. AH₂SO₄
2. BH₂SO₃
3. CHCl
4. DHNO₃

What is an empirical formula?

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

Welke uitspraak beschrijft een sterk zuur?

1. AHet heeft een pH boven 7
2. BHet ioniseert volledig in water
3. CHet geeft maar gedeeltelijk waterstofionen af
4. DHet is altijd sterk geconcentreerd

Why does ice float on liquid water?

1. AIce has a higher mass than the same volume of water
2. BIce is denser than liquid water
3. CIce contains trapped air from the freezer
4. DIce is less dense than liquid water

At 20 °C, about 36 g of NaCl dissolves in 100 g of water. If 50 g of NaCl is stirred into 100 g of water at 20 °C, what happens?

1. AAbout 36 g dissolves and about 14 g stays undissolved
2. BNone of the salt dissolves
3. CAll 50 g dissolves
4. DAbout 14 g dissolves and about 36 g stays undissolved

Een monster bevat 3,01 × 10²³ watermoleculen. Hoeveel mol is dat?

1. A0,5 mol
2. B1,81 mol
3. C2 mol
4. D3,01 mol

A salt is dissolved in water in an insulated cup, and the water temperature falls from 25 °C to 20 °C. Which statement is correct?

1. ADissolving is exothermic; the dissolving salt released heat into the water
2. BDissolving is endothermic; the dissolving salt took heat from the water
3. CDissolving is endothermic; the water took heat from the salt
4. DNo energy change occurred, because the temperature fell