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A mass loss method is more accurate because it directly measures the change in mass of the substance being studied, providing a precise indication of the amount of substance reacted or evolved. Collecting gas, on the other hand, is subject to errors due to factors such as gas leakage, incomplete collection, or the presence of other gases in the sample.
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Is mass used as a method of counting atoms?
Mass is not used as a method of counting atoms directly. Instead, the atomic mass unit (amu) is used to measure the mass of individual atoms relative to the mass of a carbon-12 atom. The mole is the unit used to count atoms, with 1 mole containing Avogadro's number of atoms.
Which balance is more precise if the mass of something is actually 12.1G which balance is more accurate?
The balance that shows the mass as 12.1g is more accurate. Accuracy refers to how close a measurement is to the actual value, while precision refers to how consistent a measurement is when repeated. In this case, the balance that displays 12.1g is both accurate and precise.
Which Method is used for collecting gases soluble in water and lighter than air?
The method used for collecting gases soluble in water and lighter than air is to displace the gas using a downward displacement of water. The gas is collected by allowing it to bubble up through a tube submerged in a container of water, where it displaces the water. This method allows for the gas to be collected without escaping into the atmosphere.
How HRESIMS identify a molecular formula?
High-resolution electrospray ionization mass spectrometry (HRESIMS) works by measuring the accurate mass of ions produced from a sample. By comparing the accurate mass of the ions with the mass of potential molecular formulas, HRESIMS can identify the most likely molecular formula based on the mass-to-charge ratio of the ions produced.
Why are masses in chemistry lab usually determined by a difference method?
Masses are typically determined by a difference method in chemistry labs to minimize errors introduced by other factors, such as variations in weighing equipment or environmental conditions. By measuring the difference in mass before and after a reaction or process, these potential sources of error are canceled out, providing a more accurate measurement of the mass change.
Why do you measure the mass of an object before measuring its volume using the displacement method?
To get the accurate weight/mass before the objects gets wet.
What would you expect the average mass of a penny to be the same whether it is calculated by method 1 or method 2?
The average mass of a penny should be the same regardless of the method used if both methods are accurate and precise. The mass of the penny is an intrinsic property that should not change based on how it is calculated.
Is Body mass index is the most accurate method of determining body composition Select one True False?
true
Which is the most accurate test to measure body fat?
Dual energy X-ray absorptiometry, DEXA, is one of the more accurate methods of measuring body fat. Based on the principle that you can measure the density of bones by the amount of photon energy absorbed, this method measures bone mass, lean muscle mass and fat tissue mass.
Is it acceptable to determine the mass of a chemical sample by placing it directly on the pan of the balance?
Placing the chemical sample directly on the pan of the balance may not give an accurate measurement of its mass due to potential contamination, degradation of the balance, or loss of sample. It's better to use weighing boats or containers to prevent direct contact and ensure accurate measurements.
Is mass used as a method of counting atoms?
Mass is not used as a method of counting atoms directly. Instead, the atomic mass unit (amu) is used to measure the mass of individual atoms relative to the mass of a carbon-12 atom. The mole is the unit used to count atoms, with 1 mole containing Avogadro's number of atoms.
Would a math or mass determined area be more accurate?
Mass
What is an alternative method to measure the charge to mass ratio of an electron?
Modern Mass Spectrometry is the alternative method to measure the charge to mass ratio of an electron.
How do you use a balance to obtain an accurate mass?
By comparing the sample with a known mass
Why is determination of density by the slope method generally more accurate than a from individual data points?
The determination of density by the slope method is generally more accurate because it involves finding the slope of a linear relationship between mass and volume, which reduces the effect of random errors in individual data points. This method is based on multiple data points and takes into account the overall trend in the data, leading to a more precise calculation of density.
Which of the following can be used to test the presence of water?
An analytical method is the Karl Fischer titration.Thermogravimetry is useful but more complicate.Also a loss of mass during heating may be due to the presnce of water.
Why is the mass spectrum so accurate?
Mass spectrometry is accurate because it separates different ions based on their mass-to-charge ratio, providing specific and distinct peaks for each compound. The use of high-resolution instruments and accurate calibration methods further enhance the precision of mass spectrometry results. Additionally, the ability to confirm the identity of a compound by comparing its mass spectrum to reference databases ensures accurate identification.
