What is the pH of the mixed solution of 20mL 0.05M NaOH
30mL 0.02M H3PO4
20mL 0.02M HCl
30mL 0.02M NaCl?
Given that Pka1 of H3PO4 - 2.12
Pka2 - 7.2
Pka3 - 12.44
Please solve it step by step. I am struggling to understand how to solve it. Thank you!

Janel’s class studied properties of matter and how matter can change. janel decided she would do an experiment mixing baking soda and vinegar.question: describe the properties of baking soda and vinegar, and explain the changes that janel should see when she mixes the two types of matter. •first, identify the physical state of matter of baking soda. describe another property of baking soda. •next, identify the physical state of matter of vinegar. describe another property of vinegar. •then, explain what janel should see when she mixes the baking soda and vinegar. •describe the states of matter of the new materials that are formed. •explain how janel can be certain a change has occurred. me

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

The volume of a single vanadium atom is 9.29×10-24 cm3. what is the volume of a vanadium atom in microliters?