- Every element at an even index

- Every even number

- All elements in reverse order

- Only the first and last element

### Recently Asked Questions

- We need 1.00L of a formic acid/formate (Ka= 1.80x10-4) buffer with a starting pH of 3.500. It must be able to resist the addition of 20.00mL of 0.250M NaOH

- Breakeven analysis can be used to study the effects of a general expansion in the level of the company's operations. analyze the consequences of the investment

- What is the concentration of a HNO 3 solution if 10.0 mL of the solution is neutralized by 3.6 mL of a 0.20M NaOH solution? Please explain how to do this