Igcse Chemistry Questions And Answers Pdf ^hot^ Instant

$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$

Diffusion is the net movement of particles from a region of higher concentration to a region of lower concentration. Example: The spreading of the smell of perfume throughout a room. igcse chemistry questions and answers pdf

Solid sublimes into a gas (bypassing the liquid state). Iodine and dry ice (solid carbon dioxide) are common examples. $CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$ Diffusion

How do you calculate the density of a substance? Answer: The density of a substance can be calculated using the formula: density = mass / volume. and vehicle emissions.

What are the main causes of air pollution? Answer: The main causes of air pollution include the burning of fossil fuels, industrial activities, and vehicle emissions.