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Why is it advisable to keep atmospheric moisture from getting into the sample?
Moisture in the sample can introduce contamination or alter the sample's composition, leading to inaccurate results. It can also cause degradation of the sample, resulting in the loss of important information. Keeping atmospheric moisture out helps maintain the integrity of the sample for more reliable analysis.
How do you find moisture content in sand?
Moisture content in sand can be determined by taking a sample, drying it in an oven, and then weighing it before and after to calculate the difference in weight. The moisture content is expressed as a percentage of the weight of water compared to the dry weight of the sample.
A sample is prepared by completely dissolving 10.0 grams of NaCl in 1.0 liter of H2o. which classification best describes this sample?
The sample described is a saturated solution because it contains the maximum amount of NaCl that can dissolve in 1.0 liter of water at that temperature.
When a fixed sample of gas increases in volume?
When a fixed sample of gas increases in volume, its pressure decreases because the gas particles have more space to move around, resulting in fewer collisions with the container walls. The temperature of the gas typically remains constant.
Which sample of water has the lowest vapor pressure?
The sample of water that has the lowest vapor pressure is the sample at a lower temperature. Vapor pressure decreases as temperature decreases because fewer molecules have enough energy to escape into the gas phase.
A sample of ammonium nitrate is placed in a beaker of water and immediately begins to dissolve What exactly occurs during this process?
The temperature will decrease
Why is it advisable to keep atmospheric moisture from getting into the sample?
Moisture in the sample can introduce contamination or alter the sample's composition, leading to inaccurate results. It can also cause degradation of the sample, resulting in the loss of important information. Keeping atmospheric moisture out helps maintain the integrity of the sample for more reliable analysis.
Imagine that bubbles begin to form a sample of liquid but the temperature did not change.what must have happened to cause this change?
The decrease in pressure caused the bubbles to form in the liquid sample without changing the temperature. This could occur, for example, if the liquid was moved to a region of lower pressure, releasing dissolved gases as bubbles.
What is the difference between moisture and loss on drying?
Moisture content refers to the total amount of water present in a material, while loss on drying is a method used to determine the amount of moisture in a sample by measuring the weight lost after drying it. Loss on drying involves heating a sample to evaporate moisture, which is different from directly measuring the total amount of water present in a material.
What Happens To The Width Of The Confidence Interval If You Decrease The Confidence Level Decrease The Sample Size or Decrease the margin of error?
The width of the confidence interval willdecrease if you decrease the confidence level,increase if you decrease the sample sizeincrease if you decrease the margin of error.
Will the standard error decrease if the sample size increases?
it should decrease
What is difference between fine coal moisture and inhereent moisture and free moisture?
Fine Coal Moisture: not familiar with this term. I assume it is the Total Moisture in the fine fraction of coal. Fine fraction or "fines" is sometimes defined as the -0.5 mm fraction. "Inherent Moisture" is a non-preferred term according to Australian Standard 2418-1995: Coal & Coke - Glossary of Terms. It is sometimes used to mean the moisture retained by a coal or coke sample, after it has attained equilibrium with the atmosphere to which it is exposed. "Inherent" is not a good word here because the atmosphere to which the sample is exposed is not normally controlled for temperature or humidity. Alternatively, "Inherent Moisture" is also used to mean "Equilibrium Moisture" = "Bed Moisture" = "In-situ Moisture", which is an ASTM test for moisture retained after the sample has attained equilibrium with an atmosphere of controlled humidity and temperature. These two usages of Inherent Moisture are not even approximately the same; the term is therefore ambiguous and should not be used. "Free Moisture" = "Surface Moisture" is the moisture that is lost by the coal or coke in attaining equilibrium with the air to which it is exposed (AS2418). This air would normally be at ambient temperature and humidity.
How much ice water will it take to cool the sample to 20 degrees celsius?
To calculate the amount of ice water needed to cool the sample to 20 degrees Celsius, you would need the initial temperature of the sample, the mass of the sample, and the specific heat capacities of water and ice. With this information, you could use the equation q = m * c * ΔT to determine the quantity of ice water needed to cool the sample.
What happens to width of interval if you decrease the sample size?
It will decrease too. * * * * * If it is the confidence interval it will NOT decrease, but will increase.
Which sample had the lowest final temperature?
Sample B had the lowest final temperature.
A DECREASE in the density of a sample of a gas inside a balloon could be caused by?
An increase in temperature, causing the gas particles to move faster and spread out more, resulting in decreased density. Additionally, a decrease in the number of gas particles in the balloon could also lead to a decrease in density.
How do you do a lab to find out if impurities such as glucose raises the temperature of stearic acid?
Start by measuring the initial temperature of pure stearic acid. Add a known amount of impurity (glucose) to the stearic acid and measure the temperature change. Compare the temperature change to a control sample of pure stearic acid to see if the impurity caused a temperature increase, suggesting it may be raising the temperature of the stearic acid due to its physical or chemical properties.
