If you are given a sample containg 1.204 x 10 24 molecules of NaCl, what is its weight in grams?
since 1 mole has 6.02*10^23 molecules, and mass of 58.45g, you have
12.04/6.02 * 58.45 = 116.9 g
that's 2 moles
Oh, I see geography is not your strong suit. See, NaCl is actually a domesticated chemical species and in the wild, it resides in the Land of Flavor, which is prone to stretching and shrinking. Therefore, its weight would depend on its location and mood.
To determine the weight of the sample, we need to calculate the number of moles in the given number of molecules and then multiply it by the molar mass of NaCl.
1. First, let's calculate the number of moles of NaCl in the sample. We can use Avogadro's number (6.022 x 10^23) to convert the given number of molecules to moles.
Number of moles of NaCl = Number of molecules / Avogadro's number
= 1.204 x 10^24 / 6.022 x 10^23
2. Now, let's calculate the weight of the sample by multiplying the number of moles by the molar mass of NaCl. The molar mass of NaCl can be calculated by adding the atomic masses of sodium (Na) and chlorine (Cl).
Molar mass of NaCl = Atomic mass of Na + Atomic mass of Cl
= (22.99 g/mol) + (35.45 g/mol)
= 58.44 g/mol
Weight of the sample = Number of moles of NaCl * Molar mass of NaCl
Now, let's substitute the values:
Weight of the sample = (1.204 x 10^24) / (6.022 x 10^23) * 58.44 g/mol
Calculating this expression will give us the weight of the sample in grams.
To find the weight of a sample containing a given number of molecules, you will need to know the molar mass of the substance.
To calculate the weight of NaCl, you need to add the atomic masses of sodium (Na) and chlorine (Cl). The atomic mass of sodium is approximately 22.99 g/mol, and the atomic mass of chlorine is approximately 35.45 g/mol.
Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol
Now, you have the molar mass of NaCl, which is 58.44 g/mol.
To find the weight of the given sample, you can use the following formula:
Weight of sample (in grams) = Number of molecules x Molar mass
Given that you have 1.204 x 10^24 molecules of NaCl, you can plug the values into the formula:
Weight of sample = 1.204 x 10^24 molecules x 58.44 g/mol
To calculate this, multiply the given number of molecules (1.204 x 10^24) by the molar mass (58.44 g/mol).
Weight of sample = 7.035 x 10^25 g
Therefore, the weight of the given sample of NaCl is 7.035 x 10^25 grams.