2nd-Chemical Formulas and Counting Atoms

Vocabulary Matching Match the correct word and definition. Subscript Shows how many atoms of each type of element are in a molecule. Coefficient Shows how many molecules are present. Chemical Formula Gives information about the total number of atoms and molecules present in a solution. Element A pure substance that is made up of only one type of atom. Ex: Na Compound A substance made of at least two types of atoms. Ex: NaCl How many elements are in the compound NaOH? List their names. How many atoms of carbon are present in a molecule of glucose, C6H12O6? 1 6 12 24 How many atoms of oxygen are present in a molecule of vinegar, C2H4O2? 2 4 6 8 How many molecules of glucose are present, C6H12O6? 1 6 12 24 How many total atoms are in a molecule of baking soda, NaHCO3 ? 4 6 12 24 What is thedifferencebetween the chemical formulas Co2 and CO2? (Hint: it would be good to use element names...look at the periodic table). How many molecules of water are in 2H2O? 1 2 3 4 How many total hydrogen atoms would be in Aspirin, 2C9H8O4? 2 8 10 16 Chemical Formula Total # of Atoms # of Molecules NaC2H3O2 8 1 3CaCO3 15 3 2H3SO4 16 2