Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

How is percent yield calculated?

1. A(Mass of reactants ÷ mass of products) × 100
2. BActual yield − theoretical yield
3. C(Actual yield ÷ theoretical yield) × 100
4. D(Theoretical yield ÷ actual yield) × 100

A + B → AB tepkimesi hangi tür tepkimeyi gösterir?

1. AAyrışma tepkimesi
2. BTek yer değiştirme tepkimesi
3. CYanma tepkimesi
4. DBirleşme (sentez) tepkimesi

Which group of biological molecules includes fats, oils and cholesterol?

1. ALipids
2. BCarbohydrates
3. CNucleic acids
4. DProteins

Which coefficients balance __KClO₃ → __KCl + __O₂?

1. A1, 1, 1
2. B2, 2, 3
3. C1, 1, 3
4. D2, 1, 3

Which halogen is the most reactive?

1. ABromine
2. BChlorine
3. CFluorine
4. DIodine

What is the normal boiling point of a liquid?

1. AThe temperature at which its vapour pressure equals 1 atmosphere
2. BThe temperature at which it first starts to evaporate
3. CThe temperature at which its density is greatest
4. DThe temperature at which its particles stop moving

A compound has the empirical formula CH₂ and a molar mass of 42 g/mol (C = 12, H = 1). What is its molecular formula?

1. AC₄H₈
2. BC₂H₄
3. CC₃H₆
4. DCH₂

A solution of a strong acid has pH 2. It is diluted with water to 10 times its original volume. What is the new pH?

1. A0,2
2. B1
3. C20
4. D3