Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What should a student always wear to protect the eyes when working with chemicals?

1. ASunglasses
2. BSafety goggles
3. CReading glasses
4. DContact lenses

Which group contains the alkaline earth metals, such as magnesium and calcium?

1. AGroup 17
2. BGroup 2
3. CGroup 18
4. DGroup 1

Which two substances must be present for iron to rust?

1. ACarbon dioxide and salt
2. BNitrogen and water
3. COxygen and water
4. DHydrogen and oxygen gas only

What is a polymer?

1. AAn ion with more than one charge
2. BA small molecule containing only two atoms of one element
3. CA mixture of several different elements
4. DA large molecule built from many repeating smaller units called monomers

Nitrogen is in group 15 of the periodic table. How many valence electrons does a nitrogen atom have?

1. A5
2. B3
3. C7
4. D15

In the balanced equation __Mg + __HCl → __MgCl₂ + __H₂, what is the coefficient of HCl?

1. A3
2. B4
3. C2
4. D1

What is the percentage by mass of nitrogen in ammonium nitrate, NH₄NO₃ (N = 14, H = 1, O = 16; molar mass 80 g/mol)?

1. A60%
2. B28%
3. C35%
4. D17,5%

A liquid has a density of 1,2 g/mL. What is the mass of 250 mL of this liquid?

1. A208 g
2. B300 g
3. C30 g
4. D251,2 g