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Partikel mana dalam atom yang bermuatan positif?

1. AProton
2. BNeutron
3. CFoton
4. DElektron

What is the change from a gas directly to a solid, skipping the liquid state, called?

1. AFreezing
2. BCondensation
3. CDeposition
4. DSublimation

What is an alloy?

1. AA mixture of a metal with one or more other elements
2. BA compound formed when a metal reacts with oxygen
3. CA pure metal in its natural state
4. DA nonmetal that conducts electricity

Vinegar contains acetic acid, CH₃COOH. Which functional group makes it an acid?

1. AThe hydroxyl group of an alcohol, –OH
2. BThe amino group, –NH₂
3. CThe carboxyl group, –COOH
4. DThe methyl group, –CH₃

A patient's arterial blood pH is 7,25. How is this described?

1. AAcidosis
2. BNormal
3. CNeutral
4. DAlkalosis

Berapa muatan ion klorida?

1. A+1
2. B−1
3. C+7
4. D−2

Burning a match is strongly exothermic, so why does it not catch fire until it is struck?

1. AStriking supplies the activation energy to start the reaction
2. BStriking pushes extra oxygen into the chemicals of the match head
3. CThe match must first absorb all its energy from the air
4. DStriking makes the reaction endothermic

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

1. A17,5%
2. B35%
3. C60%
4. D28%