14. classify the following as heterogeneous or as homogeneous: sand & salt mixture hydrogen iron salt water…

14. classify the following as heterogeneous or as homogeneous: sand & salt mixture hydrogen iron salt water unfiltered air iron with rust pure water an apple nitric acid tossed salad granite wood 15. classify the following as an element, a compound, a solution, or a heterogeneous mixture: aluminum raisin bread carbon dioxide water sugar and water sulfur sulfuric acid mercury an orange water & instant coffee a pencil carbon particles & sugar nitrogen air gasoline grain alcohol

14. classify the following as heterogeneous or as homogeneous: sand & salt mixture hydrogen iron salt water unfiltered air iron with rust pure water an apple nitric acid tossed salad granite wood 15. classify the following as an element, a compound, a solution, or a heterogeneous mixture: aluminum raisin bread carbon dioxide water sugar and water sulfur sulfuric acid mercury an orange water & instant coffee a pencil carbon particles & sugar nitrogen air gasoline grain alcohol

Answer

Explanation:

Step1: Recall definitions

A homogeneous mixture has uniform composition, a heterogeneous mixture has non - uniform composition. An element is made of one type of atom, a compound is made of different types of atoms chemically bonded, and a solution is a homogeneous mixture.

Step2: Classify for question 14

  • Sand & salt mixture: Heterogeneous (visible different components).
  • Hydrogen: Homogeneous (element, pure substance).
  • Iron: Homogeneous (element, pure substance).
  • Salt water: Homogeneous (solution).
  • Unfiltered air: Homogeneous (mixture of gases with uniform composition).
  • Iron with rust: Heterogeneous (rust is a different compound on iron).
  • Pure water: Homogeneous (compound).
  • An apple: Heterogeneous (different parts like skin, flesh, seeds).
  • Nitric acid: Homogeneous (compound).
  • Tossed salad: Heterogeneous (different vegetables).
  • Granite: Heterogeneous (visible different minerals).
  • Wood: Heterogeneous (different cellular structures).

Step3: Classify for question 15

  • Aluminum: Element.
  • Raisin bread: Heterogeneous mixture.
  • Carbon dioxide: Compound.
  • Water: Compound.
  • Sugar and water: Solution.
  • Sulfur: Element.
  • Sulfuric acid: Compound.
  • Mercury: Element.
  • An orange: Heterogeneous mixture.
  • Water & instant coffee: Solution.
  • A pencil: Heterogeneous mixture (wood, graphite, eraser etc.).
  • Carbon particles & sugar: Heterogeneous mixture.
  • Nitrogen: Element.
  • Air: Solution (homogeneous mixture of gases).
  • Gasoline: Solution (homogeneous mixture of hydrocarbons).
  • Grain alcohol: Compound.

Answer:

Question 14: Sand & salt mixture: Heterogeneous Hydrogen: Homogeneous Iron: Homogeneous Salt water: Homogeneous Unfiltered air: Homogeneous Iron with rust: Heterogeneous Pure water: Homogeneous An apple: Heterogeneous Nitric acid: Homogeneous Tossed salad: Heterogeneous Granite: Heterogeneous Wood: Heterogeneous

Question 15: Aluminum: Element Raisin bread: Heterogeneous mixture Carbon dioxide: Compound Water: Compound Sugar and water: Solution Sulfur: Element Sulfuric acid: Compound Mercury: Element An orange: Heterogeneous mixture Water & instant coffee: Solution A pencil: Heterogeneous mixture Carbon particles & sugar: Heterogeneous mixture Nitrogen: Element Air: Solution Gasoline: Solution Grain alcohol: Compound