Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

According to collision theory, what must happen for particles to react?

1. AThey must stay completely still next to each other
2. BThey must collide with enough energy and the right orientation
3. CThey must both be in the solid state at the same time
4. DThey must have the same mass

How many electrons are shared in a double covalent bond?

1. A4
2. B8
3. C6
4. D2

What is an element?

1. AA substance of two or more elements chemically bonded together
2. BA substance made of only one kind of atom
3. CA particle with an electric charge
4. DA physical mixture of different substances

Al³⁺ ve O²⁻ iyonlarından oluşan alüminyum oksidin formülü nedir?

1. AAlO
2. BAlO₃
3. CAl₃O₂
4. DAl₂O₃

A solution has a pH of 2. What is its hydrogen ion concentration?

1. A1 × 10² mol/L
2. B1 × 10⁻¹² mol/L
3. C1 × 10⁻² mol/L
4. D2 mol/L

A room is at 25 °C. What is this temperature in kelvin?

1. A298 K
2. B−248 K
3. C77 K
4. D248 K

__C₃H₈ + __O₂ → __CO₂ + __H₂O denklemini denkleştirin. O₂'nin katsayısı nedir?

1. A5
2. B3
3. C4
4. D10

Methane burns as CH₄ + 2O₂ → CO₂ + 2H₂O. What mass of CO₂ (44 g/mol) forms from 16 g of CH₄ (16 g/mol)?

1. A44 g
2. B16 g
3. C88 g
4. D22 g