Okay so i’m trying to understand something for my cer. i did a lab on objects that have an equal mass but volume and density vary. now i need to defend why the volume increased and the density decreased. i’m having trouble wrapping my head around to 1. defend that and 2. if mass is extrinsic or intrinsic and why?

You know that Density = Mass/Volume, right? In symbols,

D = m/V.

If mass (m) is constant, let’s replace m with the symbol k to represent a constant. Then,

D = k/V or D ∝ 1/V

Density and Volume are inversely proportional. When one goes up, the other goes down and vice versa.

Mass is an extrinsic property because it depends on how much of the material you have. The more material you have, the greater its mass will be.

the answer is 0.42 is that is an option. this question provides no info

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.