the molar mass of NaCl is 58.45g. How many molecules does a gram of NaCl contain?
How many mols is 1 g NaCl? That's mols = grams/molar mass
Then 1 mol contains 6.02E23 molecules.
Well, let me put on my mathemagician hat. To figure out the number of molecules in a gram of NaCl, we first need to know the Avocado's number. Oops, I mean Avogadro's number! So, get ready for it... *drumroll*... it's approximately 6.022 x 10^23.
To calculate the number of molecules in a gram of NaCl, we need to do some mole-math. First, we convert the molar mass of NaCl (which is 58.45g) into moles. So, one mole of NaCl weighs 58.45 grams.
Since we know the mass is 1 gram, we divide that by the molar mass of NaCl (58.45 g/mol). And what do we get? We get approximately 0.0171 moles of NaCl.
Now, you multiply this by Avocado's, oops, Avogadro's number (6.022 x 10^23), and we end up with roughly 1.03 x 10^22 molecules of NaCl in one gram.
So, in conclusion, you've got a whole lot of NaCl molecules bustin' a move in just one gram!
To determine the number of molecules in a gram of NaCl, we need to use the Avogadro's number and the molar mass of NaCl.
First, let's calculate the number of moles of NaCl in one gram:
Molar mass of NaCl = 58.45 g/mol
Number of moles of NaCl = mass of NaCl / molar mass of NaCl
Number of moles of NaCl = 1 g / 58.45 g/mol ≈ 0.0171 mol
Next, we can use Avogadro's number, which is approximately 6.022 × 10^23 molecules/mol, to convert this to the number of molecules:
Number of molecules of NaCl = Number of moles of NaCl × Avogadro's number
Number of molecules of NaCl = 0.0171 mol × 6.022 × 10^23 molecules/mol
Number of molecules of NaCl ≈ 1.03 × 10^22 molecules
Therefore, a gram of NaCl contains approximately 1.03 × 10^22 molecules.
To determine the number of molecules in a given mass of NaCl, you need to first calculate the number of moles using the molar mass of NaCl. Then, you can calculate the number of molecules using Avogadro's number.
Step 1: Calculate the number of moles:
Molar mass of NaCl = 58.45 g/mol
Number of moles = Mass (in grams) / Molar mass
= 1 g / 58.45 g/mol
Step 2: Convert moles to molecules:
Avogadro's number (NA) is 6.022 x 10^23 molecules/mol.
Number of molecules = Number of moles x Avogadro's number
= (1 g / 58.45 g/mol) x (6.022 x 10^23 molecules/mol)
By plugging the values into the equation, you can calculate the number of molecules in one gram of NaCl.