Ravi prepared a solution of sodium chloride by mixing 5.85g of salt in 1 liter of water.
a)find molar mass of sodium chloride
b)find number of moles of sodium chloride dissolved.
molar mass NaCl = 23 for Na, 35.5 for Cl; total = 58.5
# mols = grams/molar mass = ?
I've used the atomic mass Na and Cl from memory, you should confirm them by looking on the periodic table or a chart.
To find the molar mass of sodium chloride (NaCl), we need to determine the atomic masses of sodium (Na) and chlorine (Cl) and add them together.
a) The atomic mass of sodium (Na) is 22.99 g/mol, and the atomic mass of chlorine (Cl) is 35.45 g/mol. Therefore, the molar mass of sodium chloride (NaCl) is:
Molar mass of NaCl = Atomic mass of Na + Atomic mass of Cl
= 22.99 g/mol + 35.45 g/mol
= 58.44 g/mol
The molar mass of sodium chloride is 58.44 g/mol.
b) To find the number of moles of sodium chloride dissolved, we use the formula:
Number of moles = Mass of substance / Molar mass
In this case, the mass of sodium chloride is 5.85 g, and the molar mass is 58.44 g/mol. Therefore,
Number of moles of NaCl = Mass of NaCl / Molar mass of NaCl
= 5.85 g / 58.44 g/mol
The number of moles of sodium chloride dissolved is 0.1 mol.
To find the molar mass of sodium chloride (NaCl), we need to add up the atomic masses of its component elements: sodium (Na) and chlorine (Cl).
a) Molar mass of sodium chloride (NaCl):
The atomic mass of sodium (Na) is 22.99 g/mol, and the atomic mass of chlorine (Cl) is 35.45 g/mol. Therefore, the molar mass of NaCl is:
Molar mass of NaCl = Atomic mass of Na + Atomic mass of Cl
= 22.99 g/mol + 35.45 g/mol
= 58.44 g/mol
Therefore, the molar mass of sodium chloride is 58.44 g/mol.
b) To find the number of moles of sodium chloride dissolved, we can use the following formula:
Number of moles = Mass of substance / Molar mass
In this case, the mass of sodium chloride (NaCl) is given as 5.85 g.
Number of moles of NaCl = Mass of NaCl / Molar mass of NaCl
= 5.85 g / 58.44 g/mol
Now, we can calculate the number of moles.
Number of moles of NaCl = 0.1 mol (approx.)
Therefore, approximately 0.1 moles of sodium chloride are dissolved in the solution.