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12 cards from this deck
Total mass of reactants = total mass of products
No atoms are created or destroyed, only rearranged
Same number of each element's atoms on both sides
Numbers in front of formulas to balance equations
Write the unbalanced equation with all chemical formulas
Count the atoms of each element on both sides
Adjust coefficients to equal atoms on both sides
Double-check by counting atoms again
Sum of Mr of reactants = sum of Mr of products
Total mass of all atoms in a compound
Add up relative atomic masses (Ar) of all elements
N2+3H2→2NH3N_2 + 3H_2 \rightarrow 2NH_3N2+3H2→2NH3
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