C3.1 - Introducing chemical reactions Flashcards
Give the formula for iron
Fe
Give the formula for sodium
Na
Give the formula for potassium
K
Give the formula for zinc
Zn
Metals are represented in equations by their…
Empirical formulae
Ionic compounds are represented in equations by their…
Empirical formulae
Simple covalent molecules are represented in equations by their…
Molecular formulae
The group 0 elements exist as…
Individual atoms
The group 7 elements exist as…
Diatomic molecules
Hydrogen exists as…
a diatomic molecule
Oxygen exists as…
a diatomic molecule
Nitrogen exists as…
a diatomic molecule
Sulfur exists as
a simple covalent molecule
Phosphorus exists as…
a simple covalent molecule
Silicon exists as…
a giant covalent structure
Carbon exists as
a giant covalent structure
Give the formula for silicon
Si
Give the formula for carbon
C
Atoms cannot be created or destroyed in chemical reactions. This is known as…
Conservation of mass
What does this state symbol mean?
aq
Aqueous solution (dissolved in water)
What is the unit for amount of substance?
The mole (mol)
How many moles of atoms are contained in 1 mole of water molecules?
3 moles
How many moles of atoms are contained in 4 moles of carbon dioxide molecules
12 moles
Avogadro’s constant is defined as…
The number of entities in 1 mole
The mass of 1 mole of a substance is known as the…
molar mass
What are the units of molar mass?
g/mol
