Question

Определите молекулярную массу уксусной кислоты: CH3COOHопределите молекулярную массу гидроксида меди(II) :Cu(ОН)2

Answer 1

Mr(CH₃COOH) = 12 + 1*3 + 12 + 16 + 16 + 1 = 60
Mr(Cu(OH)₂) = 64 + (1 +16)*2 = 98

Answer 2

Molecular Mass of Acetic Acid (CH3COOH)

The molecular formula of acetic acid is CH3COOH. To determine its molecular mass, we need to calculate the sum of the atomic masses of all the atoms in the formula.

The atomic masses of the elements involved are as follows: - Carbon (C): 12.01 atomic mass units (amu) - Hydrogen (H): 1.01 amu - Oxygen (O): 16.00 amu

Now, let's calculate the molecular mass of acetic acid (CH3COOH): - Carbon (C): 1 atom x 12.01 amu = 12.01 amu - Hydrogen (H): 4 atoms x 1.01 amu = 4.04 amu - Oxygen (O): 2 atoms x 16.00 amu = 32.00 amu

Adding up these values, we get: 12.01 amu + 4.04 amu + 32.00 amu = 48.05 amu.

Therefore, the molecular mass of acetic acid (CH3COOH) is approximately 48.05 amu.

Molecular Mass of Copper(II) Hydroxide (Cu(OH)2)

The molecular formula of copper(II) hydroxide is Cu(OH)2. To determine its molecular mass, we need to calculate the sum of the atomic masses of all the atoms in the formula.

The atomic masses of the elements involved are as follows: - Copper (Cu): 63.55 atomic mass units (amu) - Hydrogen (H): 1.01 amu - Oxygen (O): 16.00 amu

Now, let's calculate the molecular mass of copper(II) hydroxide (Cu(OH)2): - Copper (Cu): 1 atom x 63.55 amu = 63.55 amu - Hydrogen (H): 2 atoms x 1.01 amu = 2.02 amu - Oxygen (O): 2 atoms x 16.00 amu = 32.00 amu

Adding up these values, we get: 63.55 amu + 2.02 amu + 32.00 amu = 97.57 amu.

Therefore, the molecular mass of copper(II) hydroxide (Cu(OH)2) is approximately 97.57 amu.