Suppose that we want to prepare 1 L of a 0.400 M HCL solution from a solution of 1.00 M HCL

Use 0.400 L of the 1.00 mol·L⁻¹ solution.  

Explanation:

We can use the dilution formula to calculate the volume needed.

V₁c₁ = V₂c₂

Data:

V₁ = 1 L; c₁ = 0.400 mol·L⁻¹;  

V₂ = ?;  c₂ =   1.00   mol·L⁻¹;  

Calculation:

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).