Basics of Chemistry Cheat Sheet

A Education › Chemistry cheat sheet in English by mvdassir_

Chemistry is the science and study of matter, including its properties, composition as well as reactivity. Chemistry relates to everything that can be sensed from minute elements to complex structures. The atom and molecules are the basic unit or components of Chemistry. The study of chemists is always interested in identifying and knowing how chemical transformation occurs. It plays an essential role in science and plays a central role in daily life activities.

Basics Chemistry Mole

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Mole

In the field of chemistry, a mole is defined as the amount of a substance that contains exactly 6.02214076 * 10²³ ‘elementary entities’ of the given substance.

Number of Moles

STP vs NTP

Properties	STP	NTP
Temperature (in Kelvin)	273.16 K ≈ 273 K	293.16K ≈ 293 K
Temperature (in Celsius)	0^oC	20^oC
Pressure	1 bar= 0.9862 atm≈ 1 atm	1 atm
Pressure (in Nm²)	10⁵ Nm²	1.01*10⁵ Nm²

K= Kelvin↔(temperature)
^oC= Degree Celsius↔(temperature)
atm= atmosphere↔(pressure)
Nm²= Newton*(meter)²↔(pressure)

Percentage Composition of an Element

n= Number of atoms of the element in one molecule of the compound

Temperature Conversions

^oF= Degree Fahrenheit
^oC= Degree Celsius
K= Degree Kelvin

Laws of Chemistry

LAWS	SCIENTISTS	DATE
1. Law of Conservation of Mass	Antoine Lavoisier	1744
2. Law of Definite Composition/Proportions	Joseph Proust	1799
3. Law of Multiple Proportions	John Dalton	1804
4. Law of Gaseous volume	Gay Lussac	1808

Conversions

Volume
1 Litre= 10³ mL= 10³ cm³= 10⁻³ m³= 1 dm³

Pressure
1 atm= 76 cm of Hg= 760 mm of Hg= 760 torr
1 atm= 1.0110⁵ Nm²
1 atm= 1.0110⁵ Pa
1 bar= 0.9862 atm≈ 1 atm

mL= milli-litre
cm= centimeter
m= meter
dm= decimeter
atm= atmosphere
N= Newton
Pa= Pascals

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