Question

calculate the molecular mass of Co(NO3)2. 6H2O

Answer 1

Given:

Compound Co(NO3)2.6H2O

To Find:

Molecular mass of the given compound.

Solution:

To find the molecular mass of the compound, we first have to note down the mass of each atom.

Mass numbers of Cobalt, Nitrogen, Oxygen and Hydrogen are as follows:

Co = 59; N = 14; O = 16; H = 1

Now we calculate the masses in 3 different sets-

Cobalt + Di-Nitrate + 6×Water

Co + (NO3)2 + 6H2O

> 59 + 2{14 + 3(16)} + 6{2(1) + 16}

> 59 + 2(62) + 6(18)

> 59 + 124 + 108

> 183 + 108

>> 291

Since the unit for molecular weight of an element is gram per mole (g/mol),

291g/mol

The molecular mass of the given compound is 291 g/mol.

Answer 2

Answer:

The molecular mass of the given compound is 291 g/mol.

Explanation:

Given: Compound of cobalt given, the compound has water of crystallization attached to it that is compound is cobalt nitrate in hydrated form.

To Find: We have to calculate the molecular mass of the given compound.

Step Wise Solution: To calculate the molecular mass of a given compound we need to know the molar mass of the elements which are present in that compound.

In the above question the compound is constituted with elements like Colbat, Nitrogen and water(where water is made up of hydrogen and oxygen).

Molar Mass of Cobalt = 59 g

Molar mass of Nitrogen = 14 g

Molar mass of hydrogen = 1 g

Molar mass of oxygen = 16 g

Now we calculate the masses in 3 different sets-

As the compound is made up of Cobalt + Di-Nitrate + 6×Water

Substituting values we have:

Molar Mass =  59+(2x14)+(2x3x16)+(6x2x1)+(6x16) g

Molar Mass of Co(NO3)2. 6H2O = 59+28+96+12+96 = 291 g

Since the unit for molecular weight of an element is gram per mole (g/mol)

The molecular mass of the given compound is 291 g/mol.

So mass of the given compound is 291g.

Code:SPJ2