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

Standard atmospheric pressure (1 atm) is equal to how many millimetres of mercury?

1. A120 mmHg
2. B760 mmHg
3. C1000 mmHg
4. D100 mmHg

Where do the mole ratios used in stoichiometry come from?

1. AThe subscripts in each formula
2. BThe molar masses of the reactants
3. CThe physical states of the substances
4. DThe coefficients of the balanced equation

Which technique is used to separate the different coloured dyes in an ink?

1. AFiltration
2. BMagnetism
3. CDistillation of the ink
4. DChromatography

Oxygen has 8 electrons. What is its electron configuration?

1. A1s² 2s⁶
2. B1s² 2s² 2p⁶
3. C1s² 2p⁶
4. D1s² 2s² 2p⁴

Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?

1. APotassium hydride, KH
2. BPotassium nitrite, KNO₂
3. CPotassium nitrate, KNO₃
4. DNitrogen hydroxide, NOH

Why does the vapour pressure of a liquid increase as it is heated?

1. AThe liquid's volume decreases and squeezes out vapour
2. BThe molecules become heavier and press harder on the surface
3. CMore molecules have enough energy to escape into the gas phase
4. DThe attractions between the molecules become stronger

Qual è la massa molare del glucosio, C₆H₁₂O₆ (C = 12, H = 1, O = 16 g/mol)?

1. A168 g/mol
2. B29 g/mol
3. C96 g/mol
4. D180 g/mol

J.J. Thomson's cathode ray experiments led to which discovery?

1. AAtoms contain small, negatively charged particles
2. BElectrons occupy fixed energy levels
3. CAtoms have a dense, positively charged nucleus
4. DThe nucleus contains uncharged neutrons