Question

Determine the molar mass of NiCO3. Provide an answer to two
decimal places.

Answer 1

The molar mass of NiCO3 is calculated by adding the atomic masses of nickel, carbon, and oxygen, resulting in a molar mass of 118.70 g/mol when rounded to two decimal places.

Step-by-step explanation:

To determine the molar mass of NiCO3, you need to add together the atomic masses of one nickel (Ni) atom, one carbon (C) atom, and three oxygen (O) atoms. The atomic mass of Ni is approximately 58.69 g/mol, Carbon is 12.01 g/mol, and Oxygen is 15.999 g/mol. Now, calculate the molar mass as follows:

(1 Ni × 58.69 g/mol) + (1 C × 12.01 g/mol) + (3 O × 15.999 g/mol)

This gives:

58.69 g/mol (Ni) + 12.01 g/mol (C) + 47.997 g/mol (3 O) = 118.697 g/mol to two decimal places.

Therefore, the molar mass of NiCO3 is 118.70 g/mol when rounded to two decimal places.

Answer 2

118.70 g/mol or amu

Step-by-step explanation:

Molar mass is calculated by adding up all of the masses of the individual atoms. This can be slightly shortened by using coefficients whenever there is a repeated element. In this case we would do as follows, inserting the atomic masses of each element in place of its symbol:

(Ni) + (C) + 3(O)

So

(58.693) + (12.011) + 3(15.999) = 118.70 g/mol or amu