Once a slide is prepared and placed onto the microscope, the magnification and focus need to be altered. Describe how to change the magnification and bring the image into focus using a light microscope like the one in the simulation.

What is the mass of 8 moles of sodium atoms

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.