Question

Only help on the first one please explain. It’s due tonight.

Answer 1

Answer:

hello there, i hope this solves your problem

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Explanation:

that's a cuboid

volume of a cuboid = length x width x height

= 5 x 3 x 5

= 75 cm³

mass = 150g

density = mass/ volume

= 150/75

= 2g/mol