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According to the kinetic molecular theory, how do gas particles move?

1. AOnly when heated, and then in neat lines between the walls
2. BAlways in a single direction, set by the pull of gravity
3. CConstantly, randomly and in straight lines between collisions
4. DSlowly in fixed positions

What kind of carbon–carbon bonds do alkanes contain?

1. AAt least one double bond
2. BIonic bonds
3. COnly single bonds
4. DAt least one triple bond

What are the building blocks of carbohydrates such as starch?

1. AMonosaccharides (simple sugars) such as glucose
2. BFatty acids joined to a glycerol molecule
3. CNucleotides
4. DAmino acids

What is the mass of 0,5 mol of NaCl (molar mass 58,5 g/mol)?

1. A58,5 g
2. B29,25 g
3. C0,5 g
4. D117 g

What is the molar mass of calcium carbonate, CaCO₃ (Ca = 40, C = 12, O = 16 g/mol)?

1. A84 g/mol
2. B100 g/mol
3. C68 g/mol
4. D116 g/mol

How does evaporation differ from boiling?

1. AEvaporation produces a solid, while boiling produces a gas
2. BEvaporation needs a higher temperature than boiling
3. CEvaporation happens throughout the liquid at a set temperature; boiling happens only at the surface
4. DEvaporation happens only at the surface and at any temperature; boiling happens throughout the liquid at a set temperature

Alpha radiation is stopped by skin, yet an alpha source is very dangerous if swallowed or inhaled. Why?

1. AAlpha particles are only produced at body temperature
2. BInside the body, alpha particles deposit all their energy in nearby living cells
3. CAlpha particles turn into much more penetrating gamma rays once inside the body
4. DStomach acid makes the alpha source more radioactive

Jenis ikatan apa yang terdapat pada sepotong kawat tembaga?

1. AIkatan ion antara tembaga dan ion klorida
2. BIkatan logam: ion dalam lautan elektron
3. CIkatan kovalen dengan pasangan bersama hanya antara dua atom
4. DIkatan hidrogen antaratom tembaga