You placed an object into a graduated cylinder. The level of water went from 500 ml to 645ml. The object has a mass of 210 g. What is the density of
your object?

Explanation:

The density of a substance can be found by using the formula

From the question

mass = 210 g

volume = final volume of water - initial volume of water

volume = 645 - 500 = 145 mL

We have

We have the final answer as

Hope this helps you

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.