Scheda di esercizi di Chimica per i test di ammissione a infermieristica con soluzioni

According to the kinetic molecular theory, how do gas particles move?

1. ASlowly in fixed positions
2. BConstantly, randomly and in straight lines between collisions
3. COnly when heated, and then in neat lines between the walls
4. DAlways in a single direction, set by the pull of gravity

Qual è la formula chimica dell'acqua?

1. AH₂O
2. BOH
3. CHO₂
4. DH₂O₂

Qual è il simbolo chimico del sodio?

1. AN
2. BNa
3. CS
4. DSo

Why is a carbon dioxide extinguisher effective on many fires?

1. ACO₂ reacts chemically with the fuel to make it non-flammable
2. BCO₂ adds oxygen to cool the flames
3. CCO₂ is a liquid that soaks into the fuel
4. DCO₂ is denser than air and pushes oxygen away from the fire

Come influisce di solito l'aumento di temperatura sulla velocità di una reazione?

1. ADiminuisce la velocità
2. BFerma completamente la reazione
3. CNon ha effetto sulla velocità
4. DAumenta la velocità

Which bond joins amino acids together in a protein?

1. AAn ionic bond
2. BA glycosidic bond
3. CA hydrogen bond
4. DA peptide bond

In the reaction NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq), which ions are spectator ions?

1. AAg⁺ and Cl⁻
2. BNa⁺ and Cl⁻
3. CAg⁺ and NO₃⁻
4. DNa⁺ and NO₃⁻

Water is split as 2H₂O → 2H₂ + O₂. What volume of O₂ at STP (0 °C and 1 atm) forms from 2 mol of water?

1. A67,2 L
2. B44,8 L
3. C22,4 L
4. D11,2 L