5. what is the density of a cube with a side length of 50.0 mm and a mass of 115 grams? i need with this urgently.

Mass of the cube is 15 g and length of each side of the cube is 50.0 mm.

First calculate volume of cube as follows:

Here, a is length of each side of the cube.

Putting the value,

Now, density is defined as mass per unit volume, thus,

Putting the values,

Therefore, density of cube is .

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm