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

Step 1: Calculate the volume of the cube from the given length

The length of the side of the cube, a = 50 mm = 5 cm (since 10 mm = 1 cm)

Volume of the cube =

Step 2: Calculate the density from the known mass and calculated volume

It is given that the mass of the cube = 115 grams

Now, density of a given substance is the amount of that substance present in a unit volume

density = mass/volume = 115 grams/125 cm3 = 0.920 g/cm3

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hope this !

- melanie

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72