There are 3.20 × 10 22 atoms of copper in the outer shell of pennies. How many grams of copper is this? (Convert atoms to moles, then moles to grams)
Formula:
Molar mass:

A__ is two or more substances that are together in the same place but are not chemically combined

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Which would freeze at a higher temperature: the great salt lake or lake tahoe? a. lake tahoe would freeze at a higher temperature. b. the great salt lake would freeze at a higher temperature. c. both lakes would freeze at the same temperature.