What do the subscripts in an ionic compound represent?
What do the subscripts in an ionic compound represent?
Chemical formulas use letters and numbers to represent chemical species (i.e., compounds, ions). The numbers appearing as subscripts in the chemical formula indicate the number of atoms of the element immediately before the subscript. If no subscript appears, one atom of that element is present.
What do subscripts tell us?
A subscript tells you how many atoms of each element are present in a compound or molecule.
What do the subscripts tell you in a chemical equation?
Subscripts. We use subscripts in chemical formulae to indicate the number of atoms of an element present in am molecule or formula unit. It indicates that each water molecule contains two hydrogen atoms and one oxygen.
What does the superscript of a compound mean?
Ions have superscripts, or tiny numbers above the element’s symbol, and they show if an atom has gained or lost electrons. A positive superscript means the atom lost electrons whereas a negative superscript means it gained electrons. For example, Ca +2 lost two electrons.
How do you calculate stoichiometry?
Thus, to calculate the stoichiometry by mass, the number of molecules required for each reactant is expressed in moles and multiplied by the molar mass of each to give the mass of each reactant per mole of reaction. The mass ratios can be calculated by dividing each by the total in the whole reaction.
How stoichiometry is used in daily life?
Stoichiometry is at the heart of the production of many things you use in your daily life. Soap, tires, fertilizer, gasoline, deodorant, and chocolate bars are just a few commodities you use that are chemically engineered, or produced through chemical reactions.
How many moles of kclo3 must completely react?
Therefore, 4 moles of potassium chlorate must be used to produce 6 moles of oxygen gas.
Which ratio of oxygen to propane is correct?
Because all the reactants are gases, we can use the mole ratios to do a comparison. From the balanced equation, the ratio of oxygen to propane in the reactants is 5:1.