Gold is used for jewelry because it is malleable. This means it can be easily molded into different shapes. What is this an example of? A. Physical change B. Chemical property C. Chemical change D. Physical property Help!

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.

What is the difference between a substance "getting wet" and "being dissolved" in a liquid at the particulate level?

Calculate the temperature rise when 0.2g of propane is used to heat 400cm cubed of water.