WILL MARK BRAINLIEST ! Assume you have a burette containing a known volume and concentration of a standardized NaOH solution. If you wish to know the concentration of a sample of HCl solution using titration methods, you would also need to know: the mass of the HCl measured into the flask

the initial volume of the HCl solution in the flask

the temperature of the HCl used to reach the end point of the titration

the concentration of previous titrations performed with the NaOH solution

Volume of NaOH solution in the burette at the end (mL): 38.00. 38.75 . c . Volume of NaOH solution delivered to the flask (mL): 12.00. 11.25 . d . Volume of HCl solution added to the flask (before adding water) (mL) 10.00. 10.00 . e. Moles of NaOH added to the HCl solution (mol) f. Moles of HCl in unknown solution prior to titration (mol) g

Explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the answer is a and have a great day