Download presentation

Presentation is loading. Please wait.

Published byJemimah Hancock Modified over 6 years ago

1
Molecular and Empirical Formulas Percentage Composition: Mass of each element compared to the mass of the compound ( m / m ) or volume of each compared to the total volume ( v / v ) Method ( m / m ) Find the mass (molar or given) of the sample Divide the mass of each atom by the mass of the sample weight Multiply by 100% The total of all percentages must equal 100%

2
Molecular Formula Formula that gives the exact number of elements in a molecule or compound. Find the % Composition for each element in the compound. – If given % Composition: start with the % composition listed as decimals Find the contributing mass of each element – Multiply each % Composition by the sample weight of the compound to find the contributing mass Do a mass to mole conversion for each element Assemble the formula – The moles of each become the new subscripts of your compound

3
Empirical Formula Same steps as finding the molecular formula Find the sample weight of the compound Use % composition to find the contributing mass Do the mass to mole conversion for each element Divide all by the smallest and round to whole numbers Assemble the formula – The ratios expressed as whole numbers become the subscript numbers of the atoms

Similar presentations

© 2021 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google