Which is not an example of a code? Choose the correct answer.

A. a secret

B. a memory from the past

C. the sign language alphabet

D. the information on a credit card

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?

How much carbon is stored in the atmosphere as co2

If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?