Question

What is the molar mass of nazs04? • a. 71.05 g/mol о b. 238.22 g/mol o c. 94.04 g/mol • d. 142.04 g/mol

Answer 1

The molar mass of NaZSO4 is 71.05 g/mol.

Step-by-step explanation:

The molar mass of a compound is the sum of the atomic masses of all the atoms in the compound. To calculate the molar mass of NaZSO4, we need to find the atomic masses of Na, Zn, S, and O.

Na = 22.990 g/mol, Zn = 65.38 g/mol, S = 32.06 g/mol, and O = 16.00 g/mol.

Next, we need to determine the number of each element in the compound: 1 Na, 1 Zn, 1 S, and 4 O.

Multiplying the atomic masses by the number of atoms and summing them up, we get:

Molar mass of NaZSO4 = (1 x 22.990 g/mol) + (1 x 65.38 g/mol) + (1 x 32.06 g/mol) + (4 x 16.00 g/mol) = 71.05 g/mol.

Answer 2

To find the molar mass of Na2SO4, you sum the masses of 2 sodium atoms, 1 sulfur atom, and 4 oxygen atoms, which totals 142.041 g/mol. Thus, the correct option is d. 142.04 g/mol.

Step-by-step explanation:

To calculate the molar mass of Na2SO4, we need to know the atomic masses of sodium (Na), sulfur (S), and oxygen (O). We can find these in the periodic table:

• Na = 22.990 g/mol
• S = 32.065 g/mol
• O = 15.999 g/mol

Step 1: Determine the number of atoms of each element in Na2SO4 and then multiply by their atomic masses:

• 2 x 22.990 g/mol for Na (2 atoms of sodium)
• 1 x 32.065 g/mol for S (1 atom of sulfur)
• 4 x 15.999 g/mol for O (4 atoms of oxygen)

Step 2: Add the masses of all atoms to find the molar mass of Na2SO4:

(2 x 22.990) + (1 x 32.065) + (4 x 15.999) = 45.980 + 32.065 + 63.996 = 142.041 g/mol

Therefore, the correct option for the molar mass of Na2SO4 is d. 142.04 g/mol.