Can someone please explain how to determine the molar mass of the following

nitric acid(HNO3)
ammonium nitrate(NH4NO3)
zinc oxide(ZnO)
Cobalt chloride(CoCl2)

thanks

Look up the atomic masses on the periodic table and add them together to obtain the molar mass.

For example, HNO3, is approximately
H = 1
N = 14
O = 16 and we have three of them; therefore, 3 x 16 = 48.
Then 48 + 14 + 1 = 63.
I have rounded here and there; therefore, you need to confirm this.
Post your answers to the others if you want someone to check them.

Certainly! To determine the molar mass of a compound, you need to know the atomic masses of the elements present in the compound. The atomic masses of elements can be found on the periodic table.

For nitric acid (HNO3), we need to determine the total molar mass by adding the atomic masses of hydrogen (H), nitrogen (N), and oxygen (O) together. The atomic mass of hydrogen is 1 gram per mole (g/mol), nitrogen is 14 g/mol, and oxygen is 16 g/mol. Since there are three oxygen atoms in nitric acid, the molar mass of nitric acid can be calculated as follows:

Molar mass of HNO3 = (1g/mol x 1) + (14 g/mol x 1) + (16 g/mol x 3) = 1 + 14 + 48 = 63 g/mol.

For ammonium nitrate (NH4NO3), we need to consider all the elements present: nitrogen (N), hydrogen (H), and oxygen (O). The atomic mass of nitrogen is 14 g/mol, hydrogen is 1 g/mol, and oxygen is 16 g/mol.

Molar mass of NH4NO3 = (14 g/mol x 1) + (1 g/mol x 4) + (16 g/mol x 3) = 14 + 4 + 48 = 66 g/mol.

For zinc oxide (ZnO), we need to consider the atomic masses of zinc (Zn) and oxygen (O). The atomic mass of zinc is 65 g/mol, and oxygen is 16 g/mol.

Molar mass of ZnO = 65 g/mol + 16 g/mol = 81 g/mol.

For cobalt chloride (CoCl2), we need to consider the atomic masses of cobalt (Co) and chlorine (Cl). The atomic mass of cobalt is 59 g/mol, and chlorine is 35.5 g/mol (approximately).

Molar mass of CoCl2 = 59 g/mol + (35.5 g/mol x 2) = 59 + 71 = 130 g/mol.

Therefore, the molar masses of the compounds you mentioned are as follows:

Nitric acid (HNO3): 63 g/mol
Ammonium nitrate (NH4NO3): 66 g/mol
Zinc oxide (ZnO): 81 g/mol
Cobalt chloride (CoCl2): 130 g/mol.