Question

An experiment requires .64mol of NaCl to be dissolved in water. What mass of NaCl

would you use?
.64g
58.5g
37.44g
5.4g

Answer 1

37.44g

Step-by-step explanation:

• An experiment requires .64mol of NaCl to be dissolved in water.
• Number of moles of NaCl = 64mol

We are given to calculate the mass of NaCl that we would use.

• Molecular Mass of NaCl is 58.44 g/mol (approximately)

The relation b/w Given mass, molecular mass and number of moles is

• n = m/M

Here,

• (n) represents number of moles,
• (m) represents given mass and,
• (M) represents Molecular mass

Using the above relation, we have:

• m = n × M
• m = .64 × 58.44 g
• m = 37.40 g
  `\approx` 37.44g

Therefore, we would use 37.44g of Nacl