How did the invention of the telescope help the Italian scientist Galileo in 1609 observe the moon and see the mountains, valleys, and craters? Answer A A telescope is an instrument that magnifies tiny objects to make them appear bigger B A telescope is an instrument that magnifies distant objects to make them appear closer C A telescope is an instrument that illuminates tiny objects to make them appear bigger D A telescope is an instrument that illuminates distant objects to make them appear closer

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.