What mass of water in grams will fill a tank 100 cm long, 50 cm wide, and 30 cm high

150000 g

Explanation:

Firstly, we need to calculate the volume of the tank :

(1)

Now, is the volume that has to be filled with water, this means the volume water occupies in the tank must be equal to the volume of the tank:

(2)  

On the other hand, the density of water is and establishes the relation between its mass and its volume :

(3)  

Clearing :

(4)  

(5)  

Finally:

powerful computers now, not then

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.