Questions: A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 x 10^27 g. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of bricks? Round your answer to 2 significant digits.

Solution Steps

We are given the mass of a single brick as \(4.0 \, \text{kg}\). We need to find the mass of 1 mole of bricks.

A mole is defined as \(6.022 \times 10^{23}\) entities (Avogadro's number).

To find the mass of 1 mole of bricks, we multiply the mass of one brick by Avogadro's number: \[ \text{Mass of 1 mole of bricks} = 4.0 \, \text{kg} \times 6.022 \times 10^{23} \]

\[ 4.0 \times 6.022 \times 10^{23} = 24.088 \times 10^{23} \, \text{kg} \]

Rounding \(24.088 \times 10^{23}\) to 2 significant digits: \[ 24 \times 10^{23} \, \text{kg} \]

Final Answer