* Stoichiometry Add-In for Microsoft Excel for calculation of molecular weights, reaction coëfficients and stoichiometry.

Stoichiometry is often used to balance chemical equations ( reaction stoichiometry ).

Stoichiometry is also used to find the right amount of reactants to use in a chemical reaction ( stoichiometric amounts ).

* Stoichiometry Add-In for Microsoft Excel for calculation of molecular weights, reaction coëfficients and stoichiometry.

* Stoichiometry Add-In for Microsoft Excel for calculation of molecular weights, reaction coëfficients and stoichiometry.

In a typical chemical reaction, the air-fuel ratio must be a minimum of 14: 1 ( see Stoichiometry ).

Stoichiometry is not only used to balance chemical equations but also used in conversions, i. e., converting from grams to moles, or from grams to millilitres.

Stoichiometry () is a branch of chemistry that deals with the relative quantities of reactants and products in chemical reactions.

** Stoichiometry and modelling chemical reactions

Stoichiometry is founded on the law of conservation of mass: the mass of the reactants equals the mass of the products.

Stoichiometry can be used to find quantities such as the amount of products ( in mass, moles, volume, etc.

Stoichiometry calculations can predict how elements and components diluted in a standard solution react in experimental conditions.

Stoichiometry rests upon the very basic laws that help to understand it better, i. e., law of conservation of mass, the law of definite proportions ( i. e., the law of constant composition ) and the law of multiple proportions.

The reaction equation for elementary reactions coincides with the process taking place at the atomic level, i. e. n molecules of type A colliding with m molecules of type B ( n plus m is the molecularity ).

* In the same way, one can detect the possibility of kinetic control if a temperature change causes a change in the product ratio that is inconsistent with equation 2, assuming that is largely invariant with temperature over a modest temperature range .< ref > will be temperature-independent or nearly so if is small, which would be the case if the overall transformations to each product were of the same molecularity, for instance if both were fragmentations of a molecule to produce a pair of molecules or if both were condensations of two molecules to give a single molecule .</ ref >

** changes with temperature but is not consistent with equation 1, that is a change in temperature ( without changing the reaction time ) causes a change in the product ratio that is larger or smaller than would be expected from the change in temperature alone, assuming that is largely invariant with temperature over a modest temperature range .< ref > will be temperature-independent or nearly so if is small, which would be the case if the rate-determining steps leading to each product were of the same molecularity, for instance if both involved collisions with the same reactant .</ ref >

While the order of a reaction is derived experimentally, the molecularity is a theoretical concept and can only be applied to elementary reactions.

In elementary reactions, the reaction order, the molecularity and the stoichiometric coefficient are the same, although only numerically, because they are different concepts.

Each step is called an elementary step, and each has its own rate law and molecularity.

For example, the level of improvement noted in a recent experiment with a short course of immediate treatment for parent-child relationship problems compared favorably with the results reported by typical child guidance clinics where the hours spent in purely diagnostic study may equal or exceed the number of hours devoted to actual treatment interviews in the experimental project.

However, in the actual assessment of the cutting force by instrumental methods for any thickness of coating a number of spurious effects occur which must be taken into account and which make the measured value larger than the true cutting force indicated by eqn. ( 1 ).

The actual number of species in each group depends on the taxonomic classification followed.

The actual number of bits in a particular implementation is documented as as implemented in the file.

Informed sources report that the actual number is closer to 100, with the 50 % decline over the last four years attributable to the lack of ability within the FSC in administering insurance companies.

There are nearly 20, 000 known species of bees in seven to nine recognized families, though many are undescribed and the actual number is probably higher.

... At least 2, 505 people were sentenced for cannibalism in the years 1932 and 1933 in Ukraine, though the actual number of cases was certainly much greater.

Catullus's poems have been preserved in an anthology of 116 carmina ( the actual number of poems may slightly vary in various editions ), which can be divided into three parts according to their form: sixty short poems in varying metres, called polymetra, eight longer poems, and forty-eight epigrams.

The actual number in Scotland varies considerably — between approximately 350 to 500 due to the use of the term " island dun " for well over one hundred Hebridean examples — a distinction that has created a divide between mainland Scottish crannog and Hebridean islet settlement studies.

The Modules consisted of a number of individual electronic components and germanium transistors mounted to a circuit board, the actual circuits being based on those from the TX-2.

Species-area models are known to overpredict the number of species known to be threatened in areas where actual deforestation is ongoing, and greatly overpredict the number of threatened species that are widespread.

The actual numbers of officials and ratios per inhabitant varied, of course, per diocese depending on the number of provinces and population within a diocese.

Thus, if n < sub > r </ sub > is the average number of times a new civilization reappears on the same planet where a previous civilization once has appeared and ended, then the total number of civilizations on such a planet would be ( 1 + n < sub > r </ sub >), which is the actual reappearance factor added to the equation.

This is the actual molecular formula for formaldehyde, but acetic acid has double the number of atoms and glucose has six times the number of atoms.

The actual aircraft used by Wintgens in his pioneering aerial engagement, his Fokker M. 5K / MG with IdFlieg military serial number " E. 5 / 15 ", as it appeared at the time of the engagement.

Dr. Carl Sagan, using optimistic numbers, suggested as many as one million communicating civilizations in the Milky Way in 1966, though he later suggested that the actual number could be far smaller.

According to a number of sources, it was Emmylou who forced the band to practice and work up an actual set list.

However, the actual genetic mechanisms of haplodiploid sex determination may be more complex than simple chromosome number.

After ethnic quotas on immigration were removed in 1965 the number of actual ( first-generation ) immigrants living in the United States eventually quadrupled, from 9. 6 million in 1970 to about 38 million in 2007.

# Large number of similar exposure units: Since insurance operates through pooling resources, the majority of insurance policies are provided for individual members of large classes, allowing insurers to benefit from the law of large numbers in which predicted losses are similar to the actual losses.

We have thus over-counted the actual number of states.

Typically, the units are the actual number of threads, but as long as the proportions are maintained, the resulting pattern will be the same.