Question

name: worksheet classifying matter. classify each of the materials below. in the center column, state whether the material is a pure substance or a mixture. if the material is a pure substance, further classify it as either an element or compound in the right - hand column. if the material is a mixture, further classify it as homogeneous or heterogeneous. write the entire word in each space to earn full credit. material. pure substance. mixture. element or compound. solution(homogeneous) or mechanical mixture(heterogeneous). laundry detergent (contains white and blue crystals), sugar + pure water, (c₆h₁₂o₆ + h₂o), iron filings (fe), limestone (caco₃), orange juice (water and pulp), pacific ocean (water and salt), air, aluminum (al), magnesium (mg), acetylene (c₂h₂)

Explanation:

A pure substance is either an element or a compound. An element consists of only one type of atom, while a compound is made up of two or more different elements chemically combined. A mixture is a combination of two or more substances that are not chemically combined. Homogeneous mixtures have a uniform composition throughout, while heterogeneous mixtures have a non - uniform composition.

• Aluminum (Al) is an element, a pure substance.
• Magnesium (Mg) is an element, a pure substance.
• Acetylene ($C_2H_2$) is a compound, a pure substance.
• Air is a homogeneous mixture as it is a uniform combination of nitrogen, oxygen, and other gases.
• Pacific Ocean (water and salt) is a heterogeneous mixture as salt and water can be separated physically and the distribution of salt may not be uniform throughout the ocean.
• Orange juice (water and pulp) is a heterogeneous mixture due to the presence of pulp in the liquid.
• Limestone ($CaCO_3$) is a compound, a pure substance.
• Iron filings (Fe) are an element, a pure substance.
• Sugar + pure water ($C_{12}H_{22}O_{11}+H_2O$) is a homogeneous mixture when the sugar is dissolved uniformly in water.
• Laundry detergent (contains white and blue crystals) is a heterogeneous mixture as the different - colored crystals are not uniformly distributed.

Answer:

Material	Pure Substance or Mixture	If Pure Substance, Element or Compound	If Mixture, Homogeneous or Heterogeneous
Magnesium (Mg)	Pure Substance	Element	N/A
Acetylene ($C_2H_2$)	Pure Substance	Compound	N/A
Air	Mixture	N/A	Homogeneous
Pacific Ocean (water and salt)	Mixture	N/A	Heterogeneous
Orange juice (water and pulp)	Mixture	N/A	Heterogeneous
Limestone ($CaCO_3$)	Pure Substance	Compound	N/A
Iron filings (Fe)	Pure Substance	Element	N/A
Sugar + pure water ($C_{12}H_{22}O_{11}+H_2O$)	Mixture	N/A	Homogeneous
Laundry detergent (contains white and blue crystals)	Mixture	N/A	Heterogeneous