An object of volume has 20ml has a mass of 2.5kg what will be its density​

Need in all of themmm only answer if you know plsssss

Which subatomic particle has a negative charge

The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g