Consider the temperature versus time graph below. A graph of temperature versus time, with time in minutes as the horizontal axis and temperature in degrees Celsius as the vertical axis. 5 sections of line are labeled: 1 from 0 minutes, negative 80 degrees to 1, negative 40. 2: from 1, negative 40 to 3, negative 40. 3: from 3, negative 40 to 7, 360. 4: from 7, 360 to 15, 360. 5: from 15, 360 off the top at the chart at 18 minutes.

In which region is the substance in both the solid phase and the liquid phase?
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2
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When the volume and number of particles of a gas are constant which of the following is also constant

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block

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.