How many Litres of stock HNO3 solution (16.0 M) is required to make 400.0 ml 2.0 M solution

0.6 M

Explanation:

We use the following equation to find the concentration of the diluted solution:

M1V1 = M2V2  

where M1V1 refers to the concentration and volume of the initial solution, respectively,  and M2V2  refers to the concentration and volume of the final solution, respectively.

In this case, we are trying to find the final concentartion, M2:

M2 = M1V1/V2 = (12.0 M * 0.025 L)/ 0.500 L) = 0.6 M

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

a graduated cylinder.

explanation: