Calculate the density of an element of at 25 degrees a .017883 gram sample takes up a volume of .00400 millimeters

Naoki's bicycle has a mass of 10 kg. if naoki sits on her bicycle and starts pedaling with a force of 168 n, causing an acceleration of 2.8 m/s2, what is naoki's mass?

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?