Question

7. Find the mass of Cu(NO3)2 · 3H.O
acid and then evaporating the solution​

Answer 1

Answer:

Explanation:

Molar mass of Cu = 63.54 g/mol

Molar mass of Cu(NO3)2.3H2O = 241.60 g/mol

Applying law of conservation of mass:

1 mole of Cu will produce 1 mole of Cu(NO3)2.3H2O

That is,

63.54 g of copper will produce 241.60 g copper nitrate trihydrate.

So, 10 g of copper will produce =  241.6063.54×10 = 38.02 g241.6063.54×10 = 38.02 g of Cu(NO3)2.3H2O

Answer 2

Hydrochloric acid is simply a solution of HCl gas in water, and both will evaporate as vapors. If any dissolved salts were present in the water, they will be left as a residue after complete evaporation.

What is Mass?

The quantity of matter in a physical body is defined as mass. It also represents the body's inertia, or resistance to acceleration when a net force is applied. The mass of an object also determines its strength.

Cu molar mass = 63.54 g/mol

Cu molar mass (NO3)

241.60 g/mol = 2.3H2O

Using the law of conservation of mass:

1 mole of Cu will yield 1 mole of Cu (NO3)

2.3H2O

In other words, 63.54 g of copper will yield 241.60 g of copper nitrate trihydrate.

So 10 g of copper will yield = 241.6063.

241.6063.5410 = 38.02 g241.6063.5410 = 38.02 g of Cu (NO3)

2.3H2O

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