Science Homework Help

please see attached file.

Method 1:

Circumference of balloon (Imperial Unit)	Conversion factor	Circumference of balloon (Metric unit)
	1 in = 2.54 cm
Radius of balloon Radius = Circumference / (pi x 2) Radius = ________ (cm) / (pi x 2) Radius = ________ (cm)
Volume of balloon Volume = 4/3 x pi x ____ (cm) x ____ (cm) x ____ (cm)

Method 2:

Balloon Volume = (Water Volume + balloon) – (Water Volume)

________ (mL) = ___________(mL) – _________ (mL)

*Don’t forget that 1 mL = 1 cm3*

Wikipedia lists the average density of air at room temperature to be 0.001204 g/cm3. Now that we know the density of the air in the balloon and the volume of the balloon, we can solve for the mass of the air in the balloon.

Use the formulas below to calculate the mass of the air in the balloon.

Density(g/mL) = mass(g) / volume(mL)

Therefore:Mass(g) = Density(g/mL) x Volume(mL)

_____ (g) = _____(g/mL) x _____(mL)