Which of the statements about atoms are true? 1. All matter is made of atoms.
2. Air is between atoms in substances
3. There is nothing between atoms in a gas.
4. Living organisms are made of atoms.

Select all that apply.

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Draw the lewis dot structure for each of the following polyatomic ions

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.