How many chocolate balls do you need to melt?

[Missionz12]

Homework Statement

A recipe calls for 1.75cups of melted chocolate. All you have in the cupboard are solid chocolate balls measuring 5/16inch in diameter. How many chocolate balls do you need to melt? ( $V_{sphere} = \frac{4}{3} \pi r^3$)

The Attempt at a Solution

The attempt is much too long to write out on here, Basically I took the radius of the chocolate bar and plugged it into find the volume of the chocolate bar in inches cubed, then converted the inches cubed into centimeters cubed which is the equivalent of a milliliter and I stopped there because I realized I know no way to convert from milliliters to cups.

 

[rock.freak667]

From what I gather from google

1 cup = 240 ml