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Which mixture is a suspension?

1. ASugar dissolved in water
2. BSand stirred into water
3. COxygen dissolved in water
4. DSalt dissolved in water

What is the chemical formula of carbon dioxide?

1. ACO
2. BCO₂
3. CCO₃
4. DC₂O

What range does the common pH scale cover?

1. A0 to 14
2. B0 to 100
3. C−7 to +7
4. D1 to 10

Koefisien mana yang menyetarakan persamaan __H₂ + __O₂ → __H₂O?

1. A1, 2, 1
2. B2, 1, 2
3. C1, 1, 1
4. D2, 2, 2

Water has a high specific heat capacity. How does this help the human body?

1. AIt allows oxygen to dissolve in water more easily
2. BIt helps keep body temperature stable
3. CIt makes water a poor solvent for salts
4. DIt makes the blood more acidic

In 2KClO₃ → 2KCl + 3O₂, how many moles of O₂ form from 4 mol of KClO₃?

1. A6 mol
2. B8 mol
3. C3 mol
4. D4 mol

Zinc reacts as Zn + 2HCl → ZnCl₂ + H₂. What mass of zinc (65 g/mol) reacts completely with 50 mL of 2 M HCl?

1. A65 g
2. B6,5 g
3. C1,63 g
4. D3,25 g

Which phase change absorbs energy from the surroundings (is endothermic)?

1. AFreezing
2. BDeposition
3. CSublimation
4. DCondensation