Question

if a sample of matter can not be separated and can not be decomposed by ordinary chemical means, then is considered to be ___. * 1 point a homogeneous mixture a heterogeneous mixture a compound an element

Explanation:

1. Analyze each option:

• Homogeneous mixture: Can be separated (e.g., by distillation for a solution), so not this.
• Heterogeneous mixture: Can be separated (e.g., by filtration), so not this.
• Compound: Can be decomposed into elements by chemical means (e.g., water into H₂ and O₂), so not this.
• Element: Cannot be separated into simpler substances by ordinary chemical means and is a pure substance.

Answer:

D. an element