Ratio conversion factors

Quantitation is performed by the calibration technique. Construct a new calibration curve with methomyl oxime standard solutions (0.2, 0.4, 0.6, 0.8 and 1.0 xgmL in acetone) for each set of analyses. Plot the peak area against the injected amount of methomyl oxime on logarithmic paper. As the amount of alanycarb is measured in terms of its oxime derivative, a conversion factor of 3.8 (the molecular weight ratio of alanycarb to methomyl oxime) should be applied to obtain the net amount. The injection volume should be kept constant as the peak area varies with the injection volume in flame photometric detection. Before each set of measurements, check the GC system by injecting more than one standard solution containing ca 2-10 ng of methomyl oxime. 

Conversion factors relate the magnitudes of different units with common dimensions and are actually identities that is, 1 ft is identical to 12 in., 1 Btu is identical to 778 ftlbf, etc. Because any identity can be expressed as a ratio with a magnitude but no dimensions, the same holds for any conversion factor, i.e.,... 

Note that if the same units are used for the variables in both the model and the field, no conversion factors are needed, because only ratios are involved. 

Conversion Factor Ratio of parts per million to milligrams per cubic meter at 77°F. 

The value of the conversion factor s is determined by the required efficiency of the conversion of component A. By substituting equations (5,6) into equation (4) we find for the ratio of the total ozone consumption to the amount of ozone needed for the oxidation of component A, defined as the Ozone consumption Factor (OF) ... 

As you become more familiar with this type of question, you will be able to complete more than one step at once. Below, you can see how the conversion factors we used in each step above can be combined. Set these conversion ratios so that the units cancel out correctly. 

The viscosity of Newtonian fluids was defined as the ratio of shear stress to rate of shear r/du/dr (the conversion factor gc being temporarily... 

Often in chemistry, and especially in a laboratory setting, it is necessary to convert from one unit to another. To do so, you need only multiply the given quantity by the appropriate conversion factor All conversion factors can be written as ratios in which the numerator and denominator represent the equivalent quantity expressed in different units. Because any quantity divided by itself is equal to i, all conversion factors are equal to i. For example, the following two conversion factors are both derived from the relationship ioo centimeters = i meter ... 

The first thing you should observe is that the units of the desired answer must be mi/hr, so the original information must be used in the ratio of length/time, or as 100 yd/10 sec. Once you have made the proper decision about how to use the units of the original data, follow the same procedure as in finding a conversion factor F ... 

This factor, which is commonly called the mole ratio for the reaction, allows us to relate the moles of oxygen molecules consumed to the moles of water molecules produced. We use it in the same way we use a conversion factor when we are converting units, as illustrated in Appendix IB ... 

The balanced chemical equation for a reaction is used to set up the conversion factor from one substance to another and that conversion factor, the mole ratio for the reaction, is applied to the moles given to calculate the moles required. 

Conversion factors for various pressure units and flow units are given in Table VI.1. Table VI.2 lists values of the ratio d,/do (the density of mercury at a temperature t divided by the density of mercury at 0°C) over the temperature range 0-99°C. Capillary depression corrections for mercury in glass tubes are given in Table VI.3. The complete set of corrections for a pressure measurement is made as follows ... 

Use molar mass of Cl2 Use coefficients in as a conversion factor the balanced equation to find mole ratios... 

We need to calculate the amount of methyl tert-bu tyl ether that could theoretically be produced from 26.3 g of isobutylene and compare that theoretical amount to the actual amount (32.8 g). As always, stoichiometry problems begin by calculating the molar masses of reactants and products. Coefficients of the balanced equation then tell mole ratios, and molar masses act as conversion factors between moles and masses. 

The ratio of the nonlinearity to the various absorption coefficients have been calculated using the conversion factor in equation 6 above. W is the figure of merit defined in reference 3, and given by -... 

Note that the conversion factor is a ratio it may be squared without changing the ratio, which leads us to another setup for the solution. Pay particular attention to the way in which the units cancel. 

The information provided in the problem generated the conversion factor utilizing the ratio of pure H2S04 to H2S04 solution. 

Stoichiometry is the series of calculations on the basis of formulas and chemical equations and will be covered in Chapter 4. The use of conversion factors is common even when the relative proportions are not fixed by a chemical formula. Consider a silver alloy used for jewelry production. (Alloys are mixtures of metals and, as mixtures, may be produced in differing ratios of the metals.) A particular alloy contains 86 percent silver. Factors based on this composition, such as... 

Step 1 Determine which data you have and which conversion factors you need to use. (A conversion factor is usually a ratio of two numbers with units, such as 1000 g/1 kg. You multiply the given data by the conversion factor to get the desired units in the answer.) It is often convenient to use the following three categories to set up your solution Have, Need, and Conversion Factors. 

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