The gram formula mass of NH4Br is what (please provide explanation, thank you)​

97.95 g/mol

Explanation:

Step 1: Define molar masses

Molar Mass of N - 14.01 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of Br - 79.90 g/mol

Step 2: Find amounts of molar masses

1 mol N - 14.01 g/mol

4 mol H - 4.04 g/mol

1 mol Br - 79.90 g/mol

Step 3: Find molar mass of compound

Molar Mass N + 4 Molar Mass H + 1 Molar Mass Br

14.01 g/mol + 4.04 g/mol + 79.90 g/mol

97.95 g/mol

Option (3) is the correct answer.

Explanation:

Gram formula mass or molar mass is the sum of mass of all the individual  atoms present in the compound or formula.

For example, gram formula mass of [tex]NH_{4}Cl[/tex] is calculated as follows.

     [tex]NH_{4}Cl = Mass of N + 4 \times mass of H + mass of Cl[/tex]

                            = [tex](14.00 + 4 \times 1.00 + 35.45)[/tex] g/mol

                             = (14.00 + 4.00 + 35.45) g/mol

                             = 53.45 g/mol

                             = 53.5 g/mol (approx)

Thus, we can conclude that the gram formula mass of [tex]NH_{4}Cl[/tex] is 53.5 g/mol (approx)

The answer is (3) 53.5 g/mol. The gram formula mass means that the mass of one mol compound. 1N=14, 4H=4, 1Cl=35.5. So the gram formula mass of NH4Cl=14+4+35.5=53.5 g/mol.