Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

Jakie cząstki subatomowe znajdują się w jądrze?

1. AProtony i neutrony
2. BElektrony i neutrony
3. CProtony i elektrony
4. DSame elektrony

What is a hydrocarbon?

1. AAny compound that dissolves in water
2. BA compound made of only hydrogen and carbon
3. CA compound made of hydrogen and oxygen
4. DA carbon atom with a positive charge

Which two substances must be present for iron to rust?

1. ACarbon dioxide and salt
2. BOxygen and water
3. CHydrogen and oxygen gas only
4. DNitrogen and water

A room is at 25 °C. What is this temperature in kelvin?

1. A298 K
2. B77 K
3. C248 K
4. D−248 K

A piece of metal has a density of 8 g/cm³ and a volume of 5 cm³. What is its mass?

1. A13 g
2. B0,625 g
3. C1,6 g
4. D40 g

A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?

1. A40 g
2. B0 g
3. C20 g
4. D10 g

Jaka jest masa molowa glukozy, C₆H₁₂O₆ (C = 12, H = 1, O = 16 g/mol)?

1. A168 g/mol
2. B29 g/mol
3. C180 g/mol
4. D96 g/mol

What is the formula of iron(III) chloride?

1. AFe₃Cl
2. BFe₂Cl₃
3. CFeCl₂
4. DFeCl₃