6.2g
6.2 g
The mass of 1 mL of water is 1 g.
Mass % of CHCl3 = 15x10-4 %
Yes, the mass of a sample of water remains unchanged when it expands. This is because only its density and volume vary with temperature. As the temperature increases, two dependent changes occur: the volume of the water increases and the density decreases. These two changes happen in correlation with each other such that the mass remains exactly the same. A second way of thinking about this problem is on a molecule scale. When heating water (composed of many H2O molecules) the number of the molecules in your sample doesn't change, nor does the mass of each molecule. Therefore there is no reason your sample's mass should change (unless you lose some water, which can be prevented by using a sealed container).
The answer depends on sample of WHAT!
6.2 g
6.2 g
6.2 g
6.2 g
6.2 g
6.2 g
6.2g
The volume of a sample of water is 20 cm3. The mass of this sample is closest to
The mass of 1 mL of water is 1 g.
what?
Roughly 630mg
The definition of dry mass is the mass of a biological sample after the water content has been removed. When the water is removed, the dry mass can be compared on equal terms.