Ineed

1) the properties of a rectangular prism are listed below:
mass = 120 g
length = 3 cm
width = 2 cm
height = 1 cm
what is the density of the rectangular prism?
10 g/cm3
20 g/cm3
360 g/cm3
720 g/cm3

2) what best describes a material's ability to dissolve?
solubility
melting point
boiling point
thermal conductivity

3) what best defines an intensive property of a substance?
a property that is observable
a property that is measurable
a physical property that depends on sample size
a physical property that is independent of sample size

1. Density of the rectangular prism is  20 g/cm3

2. A material's ability to dissolve : Soubility

3. Intensive property : A physical property that is independent of sample size.

Explanation:

Volume of Prism is calculated by :

Length = 3 cm

Width = 2 cm

Height = 1 cm

V = 6 cm3

mass = 120 g

Density = 20 g/cm3

2.

Solubility :

3.

Intensive Properties:

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-