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Show how to calculate the molar concentration of arsenic in a water sample that has 1 ppm arsenic As?
1 ppm means one gram of arsenic per 1,000,000 grams of water 1,000,000 grams of water is 1,000 litres = 1,000 dm^3 (one gram = one ml) assuming we have this quantity of solution: moles arsenic = mass/Mr = 1/74.9 = 0.0133511348 moles but this is for 1,000 dm^3, so for 1 dm^3 we have 1000th of this amount, which is 1.335113485 x 10^-5 moles So the molar concentration is 1.34 x 10^-5 mol.dm^-3 (I hope)
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What is the mass of arsnic?
equivelent to Rosie O'Donnel, so in other words, alot equivelent to Rosie O'Donnel, so in other words, alot
A sample of the compound prepared in this experiment weighing 0.1021 g is dissolved in HNO?
To calculate the concentration of the sample, you need to know the volume of HNO3 used to dissolve it. Once you have that information, you can use the formula: concentration (mol/L) = mass of sample (g) / molar mass of compound (g/mol) / volume of HNO3 (L).
A 25.00 mL sample of HBr is titrated with 0.150 M standardized sodium hydoxide solution the endpoint was reached when 18.80 mL of titrant had been added calculate the molar concentration of the HBr?
Using the balanced chemical equation for the reaction between HBr and NaOH (1:1 ratio), we can determine the moles of NaOH used. From the volume of NaOH used, we can then calculate the moles of HBr present in the sample. Finally, dividing moles of HBr by the initial volume of the sample (in liters) gives the molar concentration of HBr.
How to calculate concentration from molarity?
To calculate concentration from molarity, you can use the formula: concentration (in g/L) molarity (in mol/L) x molar mass (in g/mol). This formula helps you convert the molarity of a solution into its concentration in grams per liter.
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.
Toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million ppm by mass Show how to calculate the molar concentration of arsenic in a water sam?
1 ppm means one gram of arsenic per 1,000,000 grams of water 1,000,000 grams of water is 1,000 litres = 1,000 dm^3 (one gram = one ml) assuming we have this quantity of solution: moles arsenic = mass/Mr = 1/74.9 = 0.0133511348 moles but this is for 1,000 dm^3, so for 1 dm^3 we have 1000th of this amount, which is 1.335113485 x 10^-5 moles So the molar concentration is 1.34 x 10^-5 mol.dm^-3
What is the mass of arsnic?
equivelent to Rosie O'Donnel, so in other words, alot equivelent to Rosie O'Donnel, so in other words, alot
A sample of the compound prepared in this experiment weighing 0.1021 g is dissolved in HNO?
To calculate the concentration of the sample, you need to know the volume of HNO3 used to dissolve it. Once you have that information, you can use the formula: concentration (mol/L) = mass of sample (g) / molar mass of compound (g/mol) / volume of HNO3 (L).
What information is need to calculate the pH of a solution?
The molar concentration of the hydrogen ions
A 25.00 mL sample of HBr is titrated with 0.150 M standardized sodium hydoxide solution the endpoint was reached when 18.80 mL of titrant had been added calculate the molar concentration of the HBr?
Using the balanced chemical equation for the reaction between HBr and NaOH (1:1 ratio), we can determine the moles of NaOH used. From the volume of NaOH used, we can then calculate the moles of HBr present in the sample. Finally, dividing moles of HBr by the initial volume of the sample (in liters) gives the molar concentration of HBr.
How to calculate concentration from molarity?
To calculate concentration from molarity, you can use the formula: concentration (in g/L) molarity (in mol/L) x molar mass (in g/mol). This formula helps you convert the molarity of a solution into its concentration in grams per liter.
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 can one determine the number of moles in a given sample?
To determine the number of moles in a given sample, you can use the formula: moles mass of sample (in grams) / molar mass of the substance. This formula helps you calculate the amount of substance in terms of moles based on its mass and molar mass.
Is molar concentration the same as molarity?
Yes, molar concentration is the same as molarity.
How can one determine concentration from molarity?
To determine concentration from molarity, you can use the formula: concentration molarity x molar mass. Molarity is the number of moles of solute per liter of solution, while concentration is the amount of solute in a given volume of solution. By multiplying the molarity by the molar mass of the solute, you can calculate the concentration of the solution.
How many molecules are contained in a 7.85-g sample of dimethylmercury?
To determine the number of molecules in a sample, we need to know the molar mass of dimethylmercury (C2H6Hg). The molar mass of dimethylmercury is approximately 230.62 g/mol. Using this molar mass, we can calculate that there are approximately 2.23 x 10^22 molecules in a 7.85-g sample of dimethylmercury.
How many moles of specified particles are present in a sample of N'O if each sample weighs 7.00 g?
To calculate the number of moles of particles present in a sample, you need to divide the sample's mass by the molar mass of the particles. If you specify the particles as N'O, you should provide the molar mass of N'O for an accurate calculation.
