CHEM 101 Exam 3 UNCW (Turner)

fall semester of 2026

subscript

atoms in 1 mole/compound

coefficients

moles in a substance

in a chemistry equation you need the ____ number of atoms on both sides

same

how do you find the # of atoms?

multiplying subscript by coefficient

what are your diatomic elements?

H, N, O, F, Cl, Br, I

what does your coefficient tell you?

the number of moles

Combination reaction equation

2 substances into 1 substance

what is the only combination reaction where we can predict the products?

ionic compunds (a metal + non metal)

Decomposition reaction equation

1 substance into 2 substances

decomposition reaction equation

hydrocarbon + oxygen into carbon dioxide + water

single replacement reaction equation

element + compound into a new element + new compound

redox reaction

transfer of electrons = less of one substance + oxidation of another

metal + acid reactants have what products?

a new compound + diatomic hydrogen