Examlex
Given:
Ru2S3 + O2 → Ru2O3 + S
The coefficient of Ru2S3 is 2 in the balanced chemical equation.
School-aged
A developmental phase typically ranging from 6 to 12 years old, during which children attend school and experience significant cognitive and social growth.
Preschool
An educational establishment offering early childhood education to children before they begin compulsory education at primary school.
Cyanosis
A bluish or purplish discoloration of the skin and mucous membranes due to insufficient oxygen in the blood.
Anterior Fontanel
The largest soft spot on a baby's skull where the bones haven't yet fused, allowing for growth of the brain.
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