A copper atom has a mass of ×1.0610-22 g and a penny has a mass of 2.5 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 copper atoms? Round your answer to 3 significant digits.
How many moles of copper atoms have a mass equal to the mass of a penny? Round your answer to 2 significant digits.