Question

1. which type of change (phase or physical) is making lemonade? explain briefly
2. which type of matter (ecm) is lemonade? explain briefly

which type of matter (ecm) is sugar? explain briefly

Explanation:

1. Making lemonade involves dissolving sugar in lemon - juice and water, which is a physical change as no new substances are formed. The components can be separated by physical means like evaporation.
2. Lemonade is a homogeneous mixture (a type of ECM - Estimated Composition of Matter). It has a uniform composition throughout, with sugar, lemon - juice, and water evenly distributed at a molecular level.
3. Sugar is a pure substance, specifically a compound. It has a definite chemical composition (C₁₂H₂₂O₁₁) and distinct properties, and its atoms are chemically bonded together.

Answer:

1. Physical change. Explanation: No new substances are formed; components can be separated physically.
2. Homogeneous mixture. Explanation: Uniform composition with evenly - distributed components.
3. Compound. Explanation: Definite chemical composition with chemically bonded atoms.