Clicker question: how many atoms of oxygen are in a 2. 0g sample of. Iron (ii) nitrate fe(no3)2 molar mass = 179. 87 g/mole. 2. 0 g of iron 2 nitrate (1 mole of iron 2 nitrate/ 179. 87 g/mole)(6 moles of oxygen/1 mole of iron 2 nitrate)(6. 022 x. 10^23 atoms of oxygen/1 mole of oxygen) =4. 0 x 10^22. Chemical reaction is a transformation of substances into a new substance. Cooking a grilled cheese sandwich cheese + 2 slices of bread: composed of reactants and products. Reactants on the left are combined to produce a product (on the right) 2 bread slices + 1 cheese slice 1 grilled cheese sandwich. Numbers in front of a substance are considered to be coefficients. Create a molar ratio to display how two things come together: 1 sandwich/2 bread slices = 1 sandwich or 1 cheese slice/ 2 bread slices or 1 sandwich/1 cheese slice. 6 bread slices (1 sandwich/2 bread slices)=3 sandwiches.
