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.