In the world of chemistry, stoichiometry can be a time-consuming and sometimes confusing unit to study. To help with your stoichiometry homework, here’s a brief overview of the topic and some links to useful and free calculators and problem solving programs. What is Stoichiometry? In a nutshell, it’s the process of determining how much input you need or output you’ll get for a given amount or quantity. In other words, it’s like working with any recipe in the kitchen. You need to be able to: • convert between units (volume, mass, moles, sometimes atoms/molecules/particles) • scale the chemical formula/equation (recipe) up or down A few general rules of thumb include: • convert moles to grams and grams to moles for a given molecule/substance/compound using its molar mass (also referred to as molar weight) • convert molecules to moles (particles to moles) and vice versa using Avogadro’s number, 6.02 x 10 23 • you can only convert between amount of input to output and vice versa with a BALANCED chemical equation.

STOICHIOMETRY CALCULATORS and PROBLEM SOLVERS ONLINE Double check your stoichiometry homework with these problem solvers for chemistry! Find number of moles for a given mass of substance, grams for a given number of moles, moles or grams of product given moles or grams of reactant. • User-friendly flash app, accepts and gives answers in decimal format only: • Another flash based app, with the ability to accept/give answers in both decimal and scientific notation formats.

Digital scale with flax seeds Overview Mass is a measure of the resistance of the object to acceleration. It is an inherent property of the object, contrast to weight, which depends on the gravitational field of the planet, where the object is located. If the force applied to the object and its acceleration are known, we can calculate mass m using Newton’s second law of motion: F = m a, where F is the force and a is the acceleration. Weight In everyday use, the words “mass” and “weight” are often equivalent, both referring to mass. In physics weight refers to the force that acts on an object, and is calculated as a product of mass and g, the gravitational acceleration that differs depending on the astronomical object, which creates the gravitational field that the object is affected. For example, in the case of Earth, g = 9.80665 m/s², and for the Moon it is about six times less, approximately 1.63 m/s².

Thus, an object with a mass of one kilogram has a weight of approximately 9.8 newtons (N) on the Earth, and 1.63 N on the Moon. The Moon's mass is 7.3477×10²² kg Gravitational Mass Gravitational mass refers to the measure of the gravitational force experienced by the object (passive) or deployed by it (active). When active gravitational mass increases, the gravitational field of the object becomes stronger.

Gravitational field is what keeps the astronomical objects in place and determines the structure and the layout of the Universe. Tides are also caused by the interaction between the gravitational forces of the Moon and the Earth. Passive gravitational mass measures the effect of the gravitational field of another body on an object. Increase in weight of the object results in the increase of its passive gravitational mass.

Inertial Mass Inertial mass of an object is the property of resisting the change in this object’s motion. It represents the degree of resistance of the object to being accelerated. Installing Parking Sensors Aftermarket Headlights on this page.