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:

Step1: Analyze substance P

Boiling pure water is a physical - change of state for a pure substance (water), not forming a mixture.

Step2: Analyze substance Q

Combining hydrogen and nitrogen atoms in a fixed ratio forms a compound (ammonia in this case), not a mixture.

Step3: Analyze substance R

Adding sugar to water results in a sugar - water solution. A solution is a homogeneous mixture where sugar (solute) is dissolved in water (solvent).

Step4: Analyze substance S

Compressing carbon under high - pressure may change its physical form (e.g., from graphite to diamond), but carbon is an element and not a mixture.

Answer:

R