Question

Question 1

1 pts
How many grams of sodium is contained in the final container when you dispense 564.2 mL of a
5.72 M sodium chloride solution into a beaker?
The atomic mass of sodium is 22.99 amu
The atomic mass of chlorine is 35.45 amu
Write your answer without units.
Next

Answer 1

Answer: 74.2 g Na

Step-by-step explanation:

For this question, use the definition of molarity to find moles of sodium chloride (NaCl) and then grams of sodium (Na).

Step 1: Use the definition of molarity. Convert 564.2 mL to L.

564.2 mL x (1L/1000 mL) = 0.5642 L

M = mol/L

5.72 = mol/0.5642

5.72 x 0.5642 = mol

3.227224 = mol NaCl

Step 2: Determine moles of sodium using moles of sodium chloride from step 1. There is 1 mol Na and 1 mol Cl in 1 mole NaCl.

3.227224 mol NaCl x (1 mol Na/1 mol NaCl) = 3.227224 mol Na

Step 3: Find grams of sodium (Na) in NaCl using the molar mass Na.

3.227224 mol Na x (22.99 g/1 mol Na) = 74.2 g Na