7. the 9th hr chemistry class produced the
the mass and volume of a set of objects in the lab.
y class produced the following graph when they were measuring
20
151
linear fit for: substance a l mass
m = mv+b
m (slope): 0.900 g/cm
b (y-intercept): -0.420 g
correlation: 0.998
rmse: 0.4799
mass (9)
10 -
0
-
10
15
20
25
volume (cm)
a. write the equation for the line. no naked numbers!

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at

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.

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j