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What is the number of molecules in a sample of 75.0 grams ferric chromate (Fe 55.845 Cr 51.996 O 16)?
Wiki User
∙ 8y ago
The answer is: approx. 10e23 molecules.
Wiki User
∙ 8y ago
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Which gas contains the most molecules in a 5.0 l sample?
The gas that contains the most molecules in a 5.0 L sample would be the one with the highest molar mass. This is because the number of molecules in a gas sample is directly proportional to its molar mass.
Why are there always the same number of adenine and thymine in a molecule?
Chemical analysis has shown that the number of adenine molecules in a sample of DNA is always the same as the number of thymine molecules. A sample of RNA would show that there are equal numbers of adenine molecules and uracil molecules.
A sample of water contains 3.6 moles of hydrogen atoms How many molecules of water are present in this sample?
Each water molecule contains two hydrogen atoms. Therefore, the number of water molecules present in the sample can be calculated by dividing the number of hydrogen atoms by 2. In this case, 3.6 moles of hydrogen atoms corresponds to 1.8 moles of water molecules. This is equal to approximately 1.08 x 10^24 water molecules.
How many molecules of N2 gas are in a 500.0ml sample at 780mmHg and 135 C?
To calculate the number of molecules of N2 gas, we need to use the ideal gas law. We first convert the volume to liters by dividing 500.0 ml by 1000. Then, we use the formula PV = nRT to find the number of moles of N2 gas in the sample. Finally, we multiply the number of moles by Avogadro's number (6.022 x 10^23) to find the number of molecules.
How do you work out average separation of molecules?
To work out the average separation of molecules, you would first need to measure the distances between individual molecules in a given sample. Then, you would sum up all these distances and divide by the total number of distances measured to calculate the average separation. This value gives you an idea of the average distance between molecules in the sample.
How many molecules are contained in a 4.15-g sample of dimethylmercury?
To calculate the number of molecules in a sample of dimethylmercury, you would first need to determine the number of moles in the sample using the molar mass of dimethylmercury. Then you can use Avogadro's number (6.022 x 10^23 molecules/mol) to calculate the number of molecules.
How many molecules are in sample 57.45 CF2Cl2?
To calculate the number of molecules in a sample, you need to know the mass of the sample and the molar mass of the compound. Then you can use Avogadro's number (6.022 x 10^23) to convert from grams to molecules.
How do you find purity of Ferric and non Ferric alum?
The purity of Ferric and Non-Ferric alum can be determined by conducting a chemical analysis to measure the percentage of the specific compound in the sample. This can be done using techniques such as titration, spectroscopy, or chromatography to quantitatively determine the purity of the sample. It is important to compare the results obtained from the analysis with the known standards to assess the purity accurately.
How many molecules are contained in a 4.85g sample of dimethylmercury?
To find the number of molecules in a sample of dimethylmercury, you need to calculate the number of moles first. The molar mass of dimethylmercury (Hg(CH3)2) is 230.61 g/mol. Then, divide the mass of the sample by the molar mass to get the number of moles. Finally, use Avogadro's number (6.022 x 10^23 molecules/mol) to calculate the number of molecules.
How many molecules in aluminum phosphate?
To calculate the number of molecules in aluminum phosphate, we need to know the mass of the sample. Given the mass of aluminum phosphate, we can use Avogadro's number (6.022 x 10^23 molecules/mol) to calculate the number of molecules in the sample.
How many molecules are contained in a 6.30g sample of dimethylmercury?
To find the number of molecules in a 6.30g sample of dimethylmercury, you need to know the molar mass of dimethylmercury (the molecular formula is C2H6Hg) and Avogadro's number. First, calculate the number of moles in the sample by dividing the mass by the molar mass. Then, use Avogadro's number to convert moles to molecules by multiplying by 6.022 x 10^23.
What forensic scientist is trying to find out the number of adenine in the DNA sample that he obtained from a crime scene. What can he assume about the number of adenine?
The forensic scientist can assume that the number of adenine molecules in the DNA sample is equal to the number of thymine molecules, as adenine always pairs with thymine in DNA. This is known as Chargaff's rule. By determining the number of thymine molecules, the scientist can indirectly infer the number of adenine molecules present in the DNA sample.
How many molecules are contained in a 5.00 g sample of dimethylmercury?
To determine the number of molecules in a sample, you need to know the molar mass of the compound. For dimethylmercury, the molar mass is approximately 230.6 g/mol. You can then use the formula n = m/M, where n is the number of moles, m is the mass of the sample, and M is the molar mass, to calculate the number of molecules in the sample.
How many molecules are contained in a 4.75-g sample of dimethylmercury?
To calculate the number of molecules in a sample, you need to know the molecular weight of the substance. The molecular weight of dimethylmercury is approximately 214.77 g/mol. Using this information, you can determine the number of moles in the 4.75-g sample and then convert that to the number of molecules using Avogadro's number.
How many moles of chromate ions are present in a sample that contains 3.71 moles of iron-III- chromate Fe2-CrO4-3. Dashes are parentheses.?
For every one mole of iron-III-chromate, there are three moles of chromate ions present. Therefore, in a sample containing 3.71 moles of iron-III-chromate, there would be 3.71 moles multiplied by 3, which is 11.13 moles of chromate ions.
How many molecules of H2(g) are there in a 21.25 gram sample?
To calculate the number of molecules, you first need to determine the number of moles of H2 in the 21.25 gram sample using the molar mass of H2 (2 grams/mol). Then, use Avogadro's number (6.022 x 10^23 molecules/mol) to convert moles to molecules.
How many molecules of LiCl are in a 127.17 g sample?
To find the number of molecules of LiCl in a 127.17 g sample, you first need to convert the mass of LiCl to moles using its molar mass. Then, use Avogadro's number (6.022 x 10^23) to convert moles to molecules. Calculate the number of molecules of LiCl in the sample using these values.
