Question

Question 7 (1 point)

You have 20.0g of Sodium Chloride (NaCl). This is equal to having
- particles of NaCl.
a
b
C
O d
1.35x10^24
2.06x10^23
6.02x10^23
3.12x10^24

Answer 1

A 20.0g sample of sodium chloride (NaCl) is equal to 2.06 x 10^23 particles of NaCl, after converting the mass to moles and then using Avogadro's number to find the number of particles. The correct answer is option b.

Step-by-step explanation:

To determine the number of sodium chloride particles in a 20.0g sample, we first calculate the number of moles of NaCl using its molar mass. The molar mass of NaCl is 58.44 g/mol.

Step 1. Convert from grams to moles of NaCl using the molar mass:
20.0 g ÷ 58.44 g/mol = 0.342 mol NaCl

Step 2. Calculate the number of particles (formula units) of NaCl using Avogadro's number (6.02 x 1023 particles/mol):
0.342 mol x 6.02 x 1023 particles/mol = 2.06 x 1023 particles of NaCl

Therefore, having 20.0g of sodium chloride (NaCl) is equal to having 2.06 x 1023 particles of NaCl.