Which of the following measurements would be expected to contain the greatest number of significant figures? Group of answer choices

the volume of a marble using a string and a metric ruler that measures to the ones place

the mass of a marble on a centigram balance

the volume of a marble by water displacement in a 50 mL beaker

the volume of a marble by water displacement using a 10 mL graduated cylinder

How do you lengthen a pattern piece? (family and consumer science, sewing)

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

Answer asap need 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.