Rebekah has a table that has a mass of 18.6 kg. what is the weight of the table?
a.
28.4 n
b.
9.8 n
c.
182.28 n
d.
7 n

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Can someone me with 1 to 4 plz. fast

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.