Good. You have a proper density table, and you've got some definitely anomalous results. I was actually waiting for this to happen to you, so we can talk more about your technique.
Density is mass divided by volume. You know this. But how do you get mass? And how are you determining volume? Above you said you worked with 50 ml, but measured how? Did you use a beaker to the 50 ml line? Or a graduated cylinder to its 50 mL line? Or did you use a pycnometer, which is the only way to be truly accurate?
Here's an experiment for you. Determine the density of distilled water. Do it 10 times, (or 20, or 50 or 100, if you're dedicated enough.) You can determine your accuracy -- the density of water, at 25 °C (you have been controlling the temperature all along, correct? Density varies with temperature,) is defined as 0.997. How close to this number is your average of ten trials? What is your precision? That can be defined as the standard deviation (most calculators and Excel will compute that for you,) in simple terms. How good are you at getting close to the same number over multiple trials. That will tell how good any one trial of your is.
This is what science is, and I'm saddened that no one seems to know this. Lately, particularly on this board, the definition of "fun" science is "Look at me, I can make drugs, but I'd never take them, but Whee, I'm awesome" or "Look at me, I can make the ingredients for bombs, but I'm totally not a terrrrist, but lookithow awesome I am." If you want to try to understand the anomalous results, checking your abilities is a good place to start.