"a 2.00 l graduated cylinder contains 1.40 l of buffer solution. the density of the buffer solution is 1.02 g/ml. what is the mass in grams of the buffer in the cylinder

Explanation:

1) Data:

a) V = 1.40 liter

b) D = 1.02 g/ml

c) M = ?

2) Chemical principles and formula:

Density is a physical property which expresses the mass of matter contained per unit of volume.

In mathematical form it is given by the formula:

3) Calculations:

a) Convert liters to mililiters (ml):

b) Solve for M in the formula, substitute the data, and compute:

Note that since the two data have 3 significant figures and the operation used is multiplication, the answer also has 3 significant figures.

a. they are both space stations

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