Question

the table describes how some substances were formed.

substance	description
q	formed by combining three hydrogen atoms to every nitrogen atom
r	formed by adding 5 g of sugar to 1 l of water
s	formed by compressing carbon under high pressure

based on the given descriptions, which substance is most likely a mixture?

○ p
○ q
○ r
○ s

Explanation:

• Substance P: Boiling pure water produces water vapor, which is still pure water (a compound), not a mixture.
• Substance Q: Combining three hydrogen atoms with one nitrogen atom forms ammonia (\(NH_3\)), a compound, not a mixture.
• Substance R: Adding sugar to water creates a sugar - water solution. A solution is a homogeneous mixture as it contains two substances (sugar and water) physically mixed together.
• Substance S: Compressing carbon under high pressure (like making a diamond) results in a pure form of carbon (an element), not a mixture.

Answer:

R