Asample of iron has more mass and feels heavier than the sample of gold. does this mean that the density of iron is greater?

Hey! In order to answer this question, we need to understand the difference between mass and density. Mass is the property of matter that measures its resistance to its acceleration, while density is the measure of mass per volume.

Mass is independent as it just focuses on how heavy an object is while density isn't. It can be represented by this equation.

Density = Mass/Volume

If the iron block has more mass per volume than the gold. Then you can consider that the iron has a higher density than gold. However, only if both have the same amount of volume. If there is less or more, then it can fluctuate.

This is what i found on google “when one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and atp is converted to adenosine diphosphate (adp). likewise, energy is also released when a phosphate is removed from adp to form adenosine monophosphate (amp).” i hope this you .

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later