Item 3 Which statement about speed and/or velocity is true?

Speed is measured over time.

Speed has direction and velocity.

Velocity has both speed and direction.

Speed is constant.

Nonmetal halogen family atmoic mass 35

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

What two factors can affect the properties of a hydrocarbon? a. the number of its carbon atoms and the number of single bonds b. the number of its carbon atoms and the arrangement of its atoms c. the arrangement of its atoms and the number of its double bonds