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Why is the mass measurements of the crucible and lid and sample is performed at room temperature?
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Sample copy of a beauty pageant proposal?
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What is the purpose of stirring the mixture in the calorimiter after the hot sample was poured into it?
It is doubtful that the walls of the sample holder in the calorimeter start at the same temperature as the sample. By stirring it, you can help equalize the temperature throughout the sample and bring the sample and the sample holder into thermal equilibrium before you start the measurements.
What is sulphated ash?
The sulphated ash test is an analytical test for determining the inorganic content of a sample by weight. The sample ( usually 1g) is accurately weighed into a platinum, silica crucible that has been previously ignited, cooled and weighed. The sample in the crucible is then subjected to sulphuric acid (usually 1mL) and charred at a low temperature without causing ignition of the sample until there are no more white fumes given off. The crucible with the charred sample is then placed in a furnace (temperature is dependent on monograph but typically it can be from 600 to 900 degrees celcius) until all organic matter has been burnt off. The crucible is cooled and re-weighed. The difference in sample weights being the sulphated ash content remaining. Some monographs require the sample to be re-ashed until a constand weight has been achieved. The remaining inorganic matter is typically metal oxides from most samples.
What is a subset of measurements from a population?
A sample
What will happen if a crucible containing a sample is heated with a very hot flame causing the sample to splatter out in a chemistry experiment?
The experimenter could get burned by the hot or caustic sample.
What is a sample correlation?
If measurements are taken for two (or more) variable for a sample , then the correlation between the variables are the sample correlation. If the sample is representative then the sample correlation will be a good estimate of the true population correlation.
What is the point of the range?
The difference between the temperature at which the sample begins to melt and at the temperature at which the sample completely melted-
What is the chemistry behind sulphated ash content test?
Sulfated Ash is the ash content of fresh sample being analyzed as determined in the method. Indicates level of metallic (inorganic) contents in the sample. The sample is first chared with concentrated Sulfuric Acid at low temperature in Platinum / Silica crucible and then incinerate the sample in furnace at 600 - 900°C. At this temperature the organic components are fully burnt and only the ash remains, consisting of metal oxides and contaminants. By fuming off the sample with concentrated sulfuric acid the oxides in the ash are transformed into sulfates. The difference in weight serves as measurement. UDAY SALUNKE
How much ice water will it take to cool the sample to 20 degrees celsius?
That would depend on the mass of the sample, its temperature, and what the sample is made of.
How do you know if measurements are poisson distributed?
The Kolmogorov-Smirnov one sample test.
If A 2.50-gram sample of calcium metal is heated in a 38.500 gram crucible to form a calcium oxide. if the crucible and product weigh 38.850 g what is the empirical formula for calcium oxide?
Calcium oxide is CaO.
What happens to a fixed sample of gas when its temperature changes?
If a fixed sample of gas has a change of temperature pressure would increase.
How can you be tested for alcohol?
Testing for alcohol can be performed with an alcohol breath machine, with a sample of blood drawn, with a sample of urine, with a sample of mouth fluid, or with a sample of sweat.
