Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

Where do the mole ratios used in stoichiometry come from?

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

What is oxidation, in terms of electrons?

1. ALoss of electrons
2. BLoss of protons
3. CGain of neutrons
4. DGain of electrons

Ekzotermik tepkime nedir?

1. ABaşlamak için ışığa ihtiyaç duyan tepkime
2. BÇevreden ısı alan tepkime
3. CHiçbir enerji değişiminin olmadığı tepkime
4. DÇevreye ısı veren tepkime

Which coefficients balance __KClO₃ → __KCl + __O₂?

1. A1, 1, 3
2. B1, 1, 1
3. C2, 1, 3
4. D2, 2, 3

Rubbing alcohol evaporates faster than water at room temperature. What does this suggest?

1. AIt has a higher boiling point than water
2. BIts intermolecular forces are stronger than water's
3. CIts molecules are heavier than water molecules
4. DIts intermolecular forces are weaker than water's

How does dissolving salt in water affect the water's boiling point?

1. AIt has no effect on the boiling point
2. BIt makes the water boil at room temperature
3. CIt raises the boiling point slightly
4. DIt lowers the boiling point slightly

Buzlu yola serpilen tuz buzun erimesine neden yardımcı olur?

1. ATuz buzu yoğunlaştırır, böylece yola batar
2. BTuz buzla tepkimeye girer ve çok ısı açığa çıkarır
3. CÇözünmüş tuz suyun donma noktasını düşürür
4. DTuz suyun donma noktasını yükseltir

Gently heating DNA separates its two strands, but each strand stays in one piece. Why?

1. AEach strand is held together by hydrogen bonds, while the two strands are joined by covalent bonds
2. BThe two strands are joined by ionic bonds that melt first
3. CThe strands are held together by weak hydrogen bonds, while each strand's backbone is covalent
4. DHeat converts DNA into a protein