# Chemistry 9

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a) A 2.56 balloon contains 3.66 g of gas. Find the density

b) A 45.3 g sample placed in a graduated cylinder causes the water level to rise from 25.0 mL to 41.8 mL . Find the density

• Chemistry 9 -

2.56 what. L?
b. density = mass/volume
mass = 45.3 g
volume = 41.8 mL - 35.0 mL = ?
Substitute and solve for density.

• Chemistry 9 -

Yeah sorry for typing wrong its 2.56 L balloon contains 3.66 g of gas.

• Chemistry 9 -

How do i do it?

• Chemistry 9 -

2.56 L x (1 mol/22.4L) = ? mols.
mols = g/molar mass. You know mola and grams, solve for molar mass.

• Chemistry 9 -

Thank you so much:-)

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