Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

In a chemical reaction, what is the limiting reactant?

1. AThe reactant that is left over at the end
2. BThe reactant with the largest mass
3. CThe catalyst that controls the speed
4. DThe reactant that runs out first and stops the reaction

What does the subscript 2 in H₂O tell you?

1. AWater has a charge of 2
2. BEach molecule contains two oxygen atoms
3. CEach molecule contains two hydrogen atoms
4. DThere are two water molecules

At sea level, at what temperature does pure water freeze?

1. A100 °C (212 °F)
2. B32 °C (90 °F)
3. C0 °C (32 °F)
4. D−32 °C (−26 °F)

Why does oxygen move from the alveoli of the lungs into the blood?

1. AOxygen is pumped actively into the blood
2. BThe partial pressure of oxygen is higher in the alveoli than in the blood
3. CThe partial pressure of oxygen is higher in the blood than in the alveoli
4. DOxygen is heavier than carbon dioxide

How does ionisation energy (the energy needed to remove an outer electron) generally change from left to right across a period?

1. AIt stays the same
2. BIt increases
3. CIt first falls, then rises sharply
4. DIt decreases

How many lone (non-bonding) pairs of electrons are on the oxygen atom in a water molecule?

1. A4
2. B2
3. C0
4. D1

Yağ neden suda çözünmez?

1. AYağ apolar, su kutupludur ve "benzer benzeri çözer"
2. BSu, hiçbir şeyle karışamayacak kadar yoğundur
3. CYağ molekülleri yüklü iyonlardır
4. DYağ suyla tepkimeye girerek bir katı oluşturur

Bir gaz, 6 L'lik bir kapta 1 atm basınçta. Aynı sıcaklıkta 2 L'ye sıkıştırılıyor. Yeni basınç nedir?

1. A3 atm
2. B12 atm
3. C4 atm
4. D0,33 atm