What is particulate matter (PM)?
4.3 Particulate Matter Flashcard

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•
Chemistry
•
11th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Particulate matter (PM) refers to tiny solid or liquid particles suspended in the air, which can include dust, dirt, soot, and smoke. PM is classified by size, with PM10 (particles with a diameter of 10 micrometers or smaller) and PM2.5 (particles with a diameter of 2.5 micrometers or smaller) being the most concerning for health.
2.
FLASHCARD QUESTION
Front
What is the chemical formula for sodium chloride?
Back
The chemical formula for sodium chloride is NaCl.
3.
FLASHCARD QUESTION
Front
What happens during the hydration of NaCl in water?
Back
When NaCl is dissolved in water, the sodium ions (Na+) and chloride ions (Cl-) are surrounded by water molecules, which stabilize the ions in solution. This process is known as hydration.
4.
FLASHCARD QUESTION
Front
What is the difference between a mixture and a compound?
Back
A mixture is a combination of two or more substances that retain their individual properties and can be separated by physical means, while a compound is a substance formed when two or more elements chemically bond together, resulting in new properties.
5.
FLASHCARD QUESTION
Front
What is the significance of the reaction between H2 and O2 to form H2O?
Back
The reaction between hydrogen (H2) and oxygen (O2) to form water (H2O) is a fundamental chemical reaction that demonstrates the conservation of mass, as the number of atoms of each element is the same before and after the reaction.
6.
FLASHCARD QUESTION
Front
What does the term 'g' signify in chemical equations?
Back
The term 'g' signifies that the substance is in the gaseous state.
7.
FLASHCARD QUESTION
Front
What is a molecular diagram?
Back
A molecular diagram visually represents the arrangement of atoms within a molecule, showing how they are bonded together.
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