Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

Elements in the same period of the periodic table have the same number of what?

1. AOccupied electron shells
2. BValence electrons
3. CProtons
4. DNeutrons

What is a hydrocarbon?

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

Boyle's law describes the relationship between which two properties of a gas, at constant temperature?

1. APressure and volume
2. BVolume and temperature
3. CPressure and temperature
4. DMass and volume

How does a catalyst speed up a reaction?

1. AIt raises the temperature of the reactants so they move faster
2. BIt adds extra reactant to the mixture
3. CIt provides a different pathway with a lower activation energy
4. DIt makes the reaction more exothermic

How many grams are in 2,5 kg?

1. A2500 g
2. B25 g
3. C0,0025 g
4. D250 g

What is the name of the compound CaCO₃?

1. ACalcium carbonate
2. BCalcium oxide
3. CCarbon calcium trioxide
4. DCalcium carbide

Half-normal saline (0,45% NaCl) is compared with blood plasma, which has about the same concentration as 0,9% NaCl. How is 0,45% NaCl described, and what happens to red blood cells placed in it?

1. AHypertonic; water tends to move out of the cells, which shrink
2. BHypotonic; water tends to move into the cells, which swell
3. CIsotonic; water moves equally in and out, so the cells keep their shape
4. DHypertonic; salt moves into the cells, which then swell

Balon zawiera 2,0 L gazu w 300 K. Przy stałym ciśnieniu ogrzano go do 450 K. Jaka jest nowa objętość?

1. A1,3 L
2. B3,0 L
3. C2,0 L
4. D4,5 L