A cubic container is filled up with an unknown liquid whose density is 0.180 g/cm3. The side lengh of the container is 5.00cm. Whaf is the mass of this liquid??

The mass of the liquid is 22.5 g.

A cubic container has a side length (l) of 5.00 cm. We can find the volume of the cube occupied by the liquid using the following expression.

We have 125 cm³ of a liquid with a density of 0.180 g/cm³. The mass of the liquid is:

The mass of the liquid is 22.5 g.

You can learn more about density here:

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.