Rank the following samples in mass from least to greatest.

a) 2 x 1023 S atoms
b) 0.25 mol of Cu atoms
c) 2 mol of N atoms
d) 6 x 1023 Na atoms

To rank the samples in mass from least to greatest, we need to consider the molar mass of each element and the amount of atoms or moles given.

a) 2 x 10^23 S atoms: The molar mass of Sulfur (S) is approximately 32 g/mol. Since we are given the number of atoms, we need to convert it to moles to compare it to the other samples. The conversion factor is 1 mol S = 6.022 x 10^23 atoms S. So, 2 x 10^23 S atoms is equal to (2 x 10^23) / (6.022 x 10^23) ≈ 0.33 mol S.

b) 0.25 mol of Cu atoms: The molar mass of Copper (Cu) is approximately 63.5 g/mol. Since we are given the amount in moles, no further calculation is required.

c) 2 mol of N atoms: The molar mass of Nitrogen (N) is approximately 14 g/mol. Since we are given the amount in moles, no further calculation is required.

d) 6 x 10^23 Na atoms: The molar mass of Sodium (Na) is approximately 23 g/mol. Since we are given the number of atoms, we need to convert it to moles to compare it to the other samples. Using the conversion factor 1 mol Na = 6.022 x 10^23 atoms Na, 6 x 10^23 Na atoms is equal to (6 x 10^23) / (6.022 x 10^23) ≈ 1 mol Na.

Now, let's rank the samples by comparing the number of moles:

a) 0.33 mol S
b) 0.25 mol Cu
c) 2 mol N
d) 1 mol Na

Therefore, the correct ranking from least to greatest in mass is:
b) 0.25 mol of Cu atoms
a) 0.33 mol of S atoms
d) 1 mol of Na atoms
c) 2 mol of N atoms

To rank the given samples in mass from least to greatest, we need to use the concept of molar mass. Molar mass refers to the mass of one mole of a substance, usually expressed in grams per mole (g/mol).

Let's break down each sample and determine their molar masses:

a) 2 x 10^23 S atoms - Sulfur (S) has a molar mass of approximately 32.07 g/mol. Therefore, we need to divide the given number of atoms by Avogadro's number (6.022 x 10^23) to find the number of moles. In this case, the mass is negligible since there is no indication of the number of moles present.

b) 0.25 mol of Cu atoms - Copper (Cu) has a molar mass of approximately 63.55 g/mol. The mass of this sample can be calculated by multiplying the molar mass by the number of moles: 0.25 mol Cu x 63.55 g/mol = 15.89 g.

c) 2 mol of N atoms - Nitrogen (N) has a molar mass of approximately 14.01 g/mol. The mass of this sample can be calculated by multiplying the molar mass by the number of moles: 2 mol N x 14.01 g/mol = 28.02 g.

d) 6 x 10^23 Na atoms - Sodium (Na) has a molar mass of approximately 22.99 g/mol. Similarly, divide the given number of atoms by Avogadro's number to find the number of moles: 6 x 10^23 Na atoms ÷ 6.022 x 10^23 atoms/mol = 0.995 mol Na. The mass of this sample can be calculated by multiplying the molar mass by the number of moles: 0.995 mol Na x 22.99 g/mol = 22.89 g.

Now, ranking the samples in mass from least to greatest:

a) 2 x 10^23 S atoms (mass is negligible)
b) 0.25 mol of Cu atoms (mass = 15.89 g)
c) 2 mol of N atoms (mass = 28.02 g)
d) 6 x 10^23 Na atoms (mass = 22.89 g)

16 samble takent from rendm household in arey pland