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Unit 3: Chemical Composition Common ECMs

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

Air

Back (Answer)

Mixture 78% Nitrogen (N), 21% Oxygen (O), and other gases

#2
Front (Question)

Brass

Back (Answer)

Mixture Copper (Cu), Zinc (Zn)

#3
Front (Question)

Bronze

Back (Answer)

CuSn Mixture Copper (Cu), Tin (Sn)

#4
Front (Question)

Carbon Dioxide

Back (Answer)

CO2 Compound Carbon (C), Oxygen (O)

#5
Front (Question)

Coal

Back (Answer)

CH Mixture Carbon (C), Hydrogen (H)

#6
Front (Question)

Copper (II) sulfate

Back (Answer)

CuSO4 Compound Copper (Cu), Sulfur (S), Oxygen (O)

#7
Front (Question)

Magnesium Oxide

Back (Answer)

MgO Compound Magnesium (Mg), Oxygen (O)

#8
Front (Question)

Oil (petrol, crude oil etc.)

Back (Answer)

C8H18 Mixture Carbon (C), Hydrogen (H) pure petrol (100%) is compound higher grade of petrol = higher purity

#9
Front (Question)

Ozone

Back (Answer)

O3 Compound Oxygen (O)

#10
Front (Question)

Sand

Back (Answer)

SiO2 Compound Silica (Si), Oxygen (O)

#11
Front (Question)

Sea Water/Table Salt (Sodium Chloride)

Back (Answer)

NaCl Compound Sodium (Na), Chloride (Cl)

#12
Front (Question)

Soft Drinks

Back (Answer)

Mixture Carbon Dioxide (CO2) in water (H2O)

#13
Front (Question)

Steel

Back (Answer)

Mixture Iron (Fe), Tin (Sn)

#14
Front (Question)

Sugar

Back (Answer)

C12H22O11 Compound Carbon (C), Hydrogen (H), Oxygen (O)

#15
Front (Question)

Water

Back (Answer)

H2O Compound Hydrogen (H), Oxygen (O) Tap water is mixture

#16
Front (Question)

Vinegar (ethanoic acid)

Back (Answer)

CH₃COOH Mixture Carbon (C), Hydrogen (H) Oxygen (O)

#17
Front (Question)

Chloroform (from ab)

Back (Answer)

CHCl3 Compound Hydrogen (H), Chlorine (Cl), Carbon (C)

#18
Front (Question)

Sulfuric acid (from ab)

Back (Answer)

H2SO4 Compound Hydrogen (H), Oxygen (O), Sulfur (S)

#19
Front (Question)

Hydrochloric acid (from ab)

Back (Answer)

HCl Compound Hydrogen (H), Chlorine (Cl)

#20
Front (Question)

Ammonia (from ab)

Back (Answer)

NH3 Compound Hydrogen (H), Nitrogen (N)

#21
Front (Question)

Asbestos (from ab)

Back (Answer)

Mixture

#22
Front (Question)

Ethanol (from ab)

Back (Answer)

C2H6O Compound Carbon (C), Hydrogen (H), Oxygen (O)

#23
Front (Question)

Melamine

Back (Answer)

C3H6N6 Compound Carbon (C), Hydrogen (H), Nitrogen (N)

#24
Front (Question)

Potassium

Back (Answer)

K