Question

1) Determine the mass of 5.62 ×10^23 atoms Cl. Answer in units of g.

2) What is the mass of 5.5 × 10^15 atoms of nickel (Ni)? Answer in units of g.
For Avogadro constant, use 6.022 x10^23

Answer 1

To determine the mass of 5.62 ×10^23 atoms of Cl, you need to calculate the molar mass of Cl and then convert the number of atoms to grams. The molar mass of Cl is 35.45 g/mol. The mass of 5.62 ×10^23 atoms of Cl is 3.31 grams.

Step-by-step explanation:

To determine the mass of 5.62 × 10^23 atoms of Cl, you need to calculate the molar mass of Cl and then convert the number of atoms to grams. The molar mass of Cl is 35.45 g/mol. So, for 1 mole of Cl, there are 35.45 grams. Now, you can use the given Avogadro's constant to convert the number of atoms to moles, and then multiply by the molar mass to find the mass in grams. Here's the calculation:

1. Number of moles = (Number of atoms Cl) / (Avogadro's constant)
2. Mass (g) = (Number of moles) * (Molar mass)

Plugging in the values:

1. Number of moles = (5.62 × 10^23 atoms Cl) / (6.022 × 10^23 atoms/mol) = 0.09327 moles
2. Mass (g) = (0.09327 moles) * (35.45 g/mol) = 3.31 grams

Therefore, the mass of 5.62 × 10^23 atoms of Cl is 3.31 grams.