it means that the knocking property of petrol is equal to the mixtureof 60% n-heptane and 40% iso-octane.
Take a sample out and check following; Colour - Petrol is almost clear, diesel is more yellowy Smell - Diesel and Petrol both have distinctively different smells, only way is if you get a sample of either as a reference Flash point - Petrol has a much lower flash point so will burn if ignited whereas diesel wont. If you take a very small sample and under safe and controlled circumstances try to ignite with a match if burns is petrol if not diesel Hope this helps
what is the meaning of the s in the sample history format
i believe petrol appear colored when present on wet surfaces because of its chemical composition. given that each petrol sample contain various bonds and bond angles, the presence of petrol on water (since petrol is insoluable in water), causes the light being reflected from the petrol appear in rainbow colours (ROYGBIV) since each colour has a different wave lenght
Number of Sample in set of observation.
No. A statistic is a number describing a characteristic of a sample.
The number of ions in a 6,58 mole sample of NaCl is 79,25137367812.10e23.
It is the number of elements in the sample. By contrast, the relative sample size is the absolute sample size divided by the population size.
Add the values of the variable for all elements in the sample and divide by the number of elements on the sample.
To determine the number of lb-moles in a sample, divide the weight of the sample in pounds by the molecular weight of the substance. This will give you the number of lb-moles present in the sample.
Distillation would be the method used to separate hexane and octane from the liquid sample. This process takes advantage of the difference in boiling points between the two components to vaporize and then condense each one separately. The lower boiling point component (hexane) will vaporize first, allowing it to be collected and separated from the higher boiling point component (octane).
If the chemical composition of the sample is known, then the answer is yes. However, equal masses of platinum and magnesium, for example, contain quite different numbers of atoms, because the atomic mass of platinum is much higher than that of magnesium.
The formula for calculating the mean of a sample, represented by the symbol "" in statistics, is to add up all the values in the sample and then divide by the total number of values in the sample. This can be written as: x / n, where x represents the sum of all values in the sample and n is the total number of values in the sample.