1. which type of change (phase or physical) occurred to the candle wax? explain with specific evidence\n2…

1. which type of change (phase or physical) occurred to the candle wax? explain with specific evidence\n2. which type of matter (ecm) is candle wax? explain with specific evidence\n3. the formula for bees wax is c₁₅h₃₁cooc₃₀h₆₁. which type of matter (ecm) is bees wax? explain with specific evidence\n4. which group on the p.t. is oxygen a member of?

1. which type of change (phase or physical) occurred to the candle wax? explain with specific evidence\n2. which type of matter (ecm) is candle wax? explain with specific evidence\n3. the formula for bees wax is c₁₅h₃₁cooc₃₀h₆₁. which type of matter (ecm) is bees wax? explain with specific evidence\n4. which group on the p.t. is oxygen a member of?

Answer

Explanation:

Step1: Analyze candle - wax change

When a candle burns, the solid wax melts into liquid wax upon heating. This is a physical change as the chemical composition of the wax remains the same, only the state of matter (from solid to liquid) changes. There is no new substance formed during melting.

Step2: Determine type of matter for candle - wax

Candle - wax is a mixture. It is made up of various types of wax like paraffin wax, soy wax, and beeswax along with other components such as wick, fragrance oils, and color dyes. Different substances are physically combined in candle - wax.

Step3: Determine type of matter for bees - wax

Bees - wax has a chemical formula $C_{15}H_{31}COOC_{30}H_{61}$. It is a compound. A compound is a pure substance composed of two or more different elements chemically combined in a fixed ratio. The formula indicates a specific combination of carbon (C), hydrogen (H), and oxygen (O) atoms in a defined structure.

Step4: Locate oxygen in the periodic table

Oxygen has an atomic number of 8. In the periodic table, oxygen is a member of Group 16, also known as the chalcogens.

Answer:

  1. Physical change. Evidence: Solid wax melts to liquid wax on heating without changing its chemical composition.
  2. Mixture. Evidence: Composed of different types of wax, wick, fragrance, and color dyes.
  3. Compound. Evidence: Has a specific chemical formula $C_{15}H_{31}COOC_{30}H_{61}$ indicating a fixed ratio of elements.
  4. Group 16.