Respuesta :

joseaaronlara

Answer:

The answer to your question is the letter a. 85.06 g

Explanation:

Data

1.22 moles of Ga

Process

1.- Look for the Atomic mass of Ga in the periodic table

Atomic mass = 69.72 g

2.- Use proportions to calculate the moles of Ga

                        69.72 g ------------------- 1 mol

                             x       ------------------- 1.22 moles

                             x = (1.22 x 69.72) / 1

                             x = 85.06/ 1

                             x = 85.06 g og Ga

Answer:

The mass of this gallium sample is 85.06 grams ( option A is correct).

Explanation:

Step 1: Data given

Number of moles of galium = 1.22 moles

Atomic mass of galium = 69.723 g/mol

Step 2: Calculate mass of gallium

Mass of gallium = moles gallium * molar of gallium

Mass of gallium = 1.22 moles * 69.723 g/mol

Mass of gallium = 85.062  ≈ 85.06 grams

The mass of this gallium sample is 85.06 grams ( option A is correct).

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