Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What is a beta particle?

1. AA helium nucleus with two protons and two neutrons
2. BA wave of visible light
3. CA neutron that leaves the nucleus
4. DA high-energy electron released from a nucleus

What are the building blocks of carbohydrates such as starch?

1. ANucleotides
2. BFatty acids joined to a glycerol molecule
3. CAmino acids
4. DMonosaccharides (simple sugars) such as glucose

What does the coefficient 3 in "3H₂O" mean?

1. AThere are three molecules (or moles) of water
2. BWater has a charge of 3
3. CEach molecule of water contains three hydrogen atoms
4. DEach water molecule has three oxygen atoms

In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which species loses electrons?

1. AZn
2. BCu²⁺
3. CZn²⁺
4. DCu

When a nucleus emits an alpha particle, how do its mass number and atomic number change?

1. AMass number falls by 2 and atomic number falls by 4
2. BMass number falls by 4 and atomic number falls by 2
3. CNeither changes
4. DMass number stays the same and atomic number rises by 1

Which property stays the same whether you have a small sample or a large sample of a pure substance?

1. AVolume
2. BTotal heat content
3. CMass
4. DDensity

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. B88 g
3. C22 g
4. D16 g

A reaction should produce 2 mol of a product with a molar mass of 30 g/mol, but only 48 g is collected. What is the percent yield?

1. A80%
2. B125%
3. C48%
4. D60%